diff --git a/extras/Introjucer/Source/Project Saving/jucer_ProjectExport_MSVC.h b/extras/Introjucer/Source/Project Saving/jucer_ProjectExport_MSVC.h
index 80d539bd2a..26c4ba8e16 100644
--- a/extras/Introjucer/Source/Project Saving/jucer_ProjectExport_MSVC.h	
+++ b/extras/Introjucer/Source/Project Saving/jucer_ProjectExport_MSVC.h	
@@ -171,7 +171,7 @@ protected:
     //==============================================================================
     String getIntermediatesPath (const BuildConfiguration& config) const
     {
-        return ".\\" + File::createLegalFileName (config.getName().trim());
+        return prependDot (File::createLegalFileName (config.getName().trim()));
     }
 
     String getConfigTargetPath (const BuildConfiguration& config) const
@@ -185,8 +185,8 @@ protected:
         if (binaryRelPath.isAbsolute())
             return binaryRelPath.toWindowsStyle();
 
-        return ".\\" + binaryRelPath.rebased (projectFolder, getTargetFolder(), RelativePath::buildTargetFolder)
-                                    .toWindowsStyle();
+        return prependDot (binaryRelPath.rebased (projectFolder, getTargetFolder(), RelativePath::buildTargetFolder)
+                                        .toWindowsStyle());
     }
 
     String getPreprocessorDefs (const BuildConfiguration& config, const String& joinString) const
@@ -477,6 +477,12 @@ protected:
         return versionParts.joinIntoString (",");
     }
 
+    static String prependDot (const String& filename)
+    {
+        return FileHelpers::isAbsolutePath (filename) ? filename
+                                                      : (".\\" + filename);
+    }
+
     JUCE_DECLARE_NON_COPYABLE (MSVCProjectExporterBase);
 };
 
@@ -1221,14 +1227,14 @@ protected:
         {
             XmlElement* iconGroup = projectXml.createNewChildElement ("ItemGroup");
             XmlElement* e = iconGroup->createNewChildElement ("None");
-            e->setAttribute ("Include", ".\\" + iconFile.getFileName());
+            e->setAttribute ("Include", prependDot (iconFile.getFileName()));
         }
 
         if (hasResourceFile())
         {
             XmlElement* rcGroup = projectXml.createNewChildElement ("ItemGroup");
             XmlElement* e = rcGroup->createNewChildElement ("ResourceCompile");
-            e->setAttribute ("Include", ".\\" + rcFile.getFileName());
+            e->setAttribute ("Include", prependDot (rcFile.getFileName()));
         }
 
         {
@@ -1364,7 +1370,7 @@ protected:
         {
             XmlElement* iconGroup = filterXml.createNewChildElement ("ItemGroup");
             XmlElement* e = iconGroup->createNewChildElement ("None");
-            e->setAttribute ("Include", ".\\" + iconFile.getFileName());
+            e->setAttribute ("Include", prependDot (iconFile.getFileName()));
             e->createNewChildElement ("Filter")->addTextElement (ProjectSaver::getJuceCodeGroupName());
         }
 
@@ -1372,7 +1378,7 @@ protected:
         {
             XmlElement* rcGroup = filterXml.createNewChildElement ("ItemGroup");
             XmlElement* e = rcGroup->createNewChildElement ("ResourceCompile");
-            e->setAttribute ("Include", ".\\" + rcFile.getFileName());
+            e->setAttribute ("Include", prependDot (rcFile.getFileName()));
             e->createNewChildElement ("Filter")->addTextElement (ProjectSaver::getJuceCodeGroupName());
         }
     }
diff --git a/extras/Introjucer/Source/Project Saving/jucer_ProjectExporter.cpp b/extras/Introjucer/Source/Project Saving/jucer_ProjectExporter.cpp
index dfc129d120..f398846959 100644
--- a/extras/Introjucer/Source/Project Saving/jucer_ProjectExporter.cpp	
+++ b/extras/Introjucer/Source/Project Saving/jucer_ProjectExporter.cpp	
@@ -79,7 +79,7 @@ ProjectExporter* ProjectExporter::createNewExporter (Project& project, const int
     File target (exp->getTargetFolder());
 
     if (FileHelpers::shouldPathsBeRelative (juceFolder.getFullPathName(), project.getFile().getFullPathName()))
-        exp->getJuceFolderValue() = juceFolder.getRelativePathFrom (project.getFile().getParentDirectory());
+        exp->getJuceFolderValue() = FileHelpers::getRelativePathFrom (juceFolder, project.getFile().getParentDirectory());
     else
         exp->getJuceFolderValue() = juceFolder.getFullPathName();
 
diff --git a/extras/Introjucer/Source/Project/jucer_Module.cpp b/extras/Introjucer/Source/Project/jucer_Module.cpp
index 09003e1346..dbebdcb41c 100644
--- a/extras/Introjucer/Source/Project/jucer_Module.cpp
+++ b/extras/Introjucer/Source/Project/jucer_Module.cpp
@@ -679,7 +679,7 @@ void LibraryModule::addBrowsableCode (ProjectExporter& exporter, const Array<Fil
 
     for (int i = 0; i < sourceFiles.size(); ++i)
     {
-        const String pathWithinModule (sourceFiles.getReference(i).getRelativePathFrom (localModuleFolder));
+        const String pathWithinModule (FileHelpers::getRelativePathFrom (sourceFiles.getReference(i), localModuleFolder));
 
         // (Note: in exporters like MSVC we have to avoid adding the same file twice, even if one of those instances
         // is flagged as being excluded from the build, because this overrides the other and it fails to compile)
@@ -689,7 +689,7 @@ void LibraryModule::addBrowsableCode (ProjectExporter& exporter, const Array<Fil
                                pathWithinModule);
     }
 
-    sourceGroup.addFile (localModuleFolder.getChildFile (moduleFile.getRelativePathFrom (moduleFolder)), -1, false);
+    sourceGroup.addFile (localModuleFolder.getChildFile (FileHelpers::getRelativePathFrom (moduleFile, moduleFolder)), -1, false);
     sourceGroup.addFile (getInclude (localModuleFolder), -1, false);
 
     exporter.getModulesGroup().state.addChild (sourceGroup.state.createCopy(), -1, nullptr);
diff --git a/extras/Introjucer/Source/Project/jucer_Project.cpp b/extras/Introjucer/Source/Project/jucer_Project.cpp
index b4947570ad..9f52917b08 100644
--- a/extras/Introjucer/Source/Project/jucer_Project.cpp
+++ b/extras/Introjucer/Source/Project/jucer_Project.cpp
@@ -306,8 +306,8 @@ File Project::resolveFilename (String filename) const
     filename = replacePreprocessorDefs (getPreprocessorDefs(), filename)
                 .replaceCharacter ('\\', '/');
 
-    if (File::isAbsolutePath (filename))
-        return File (filename);
+    if (FileHelpers::isAbsolutePath (filename))
+        return File::createFileWithoutCheckingPath (filename); // (avoid assertions for windows-style paths)
 
     return getFile().getSiblingFile (filename);
 }
@@ -330,7 +330,7 @@ String Project::getRelativePathForFile (const File& file) const
     if (p1.upToFirstOccurrenceOf (File::separatorString, true, false)
           .equalsIgnoreCase (p2.upToFirstOccurrenceOf (File::separatorString, true, false)))
     {
-        filename = file.getRelativePathFrom (relativePathBase);
+        filename = FileHelpers::getRelativePathFrom (file, relativePathBase);
     }
 
     return filename;
diff --git a/extras/Introjucer/Source/Utility/jucer_CodeHelpers.cpp b/extras/Introjucer/Source/Utility/jucer_CodeHelpers.cpp
index 406e2186d6..b3e13c1610 100644
--- a/extras/Introjucer/Source/Utility/jucer_CodeHelpers.cpp
+++ b/extras/Introjucer/Source/Utility/jucer_CodeHelpers.cpp
@@ -187,7 +187,7 @@ namespace CodeHelpers
 
     String createIncludeStatement (const File& includeFile, const File& targetFile)
     {
-        return createIncludeStatement (FileHelpers::unixStylePath (includeFile.getRelativePathFrom (targetFile.getParentDirectory())));
+        return createIncludeStatement (FileHelpers::unixStylePath (FileHelpers::getRelativePathFrom (includeFile, targetFile.getParentDirectory())));
     }
 
     String createIncludeStatement (const String& includePath)
diff --git a/extras/Introjucer/Source/Utility/jucer_FileHelpers.cpp b/extras/Introjucer/Source/Utility/jucer_FileHelpers.cpp
index 66dc9a2b4c..13d4a6ad51 100644
--- a/extras/Introjucer/Source/Utility/jucer_FileHelpers.cpp
+++ b/extras/Introjucer/Source/Utility/jucer_FileHelpers.cpp
@@ -112,12 +112,19 @@ namespace FileHelpers
         return path.replaceCharacter ('/', '\\');
     }
 
+    bool isAbsolutePath (const String& path)
+    {
+        return File::isAbsolutePath (path)
+                || path.startsWithChar ('/') // (needed because File::isAbsolutePath will ignore forward-slashes on Windows)
+                || path.startsWithChar ('$')
+                || path.startsWithChar ('~')
+                || (CharacterFunctions::isLetter (path[0]) && path[1] == ':')
+                || path.startsWithIgnoreCase ("smb:");
+    }
+
     static String appendPath (const String& path, const String& subpath)
     {
-        if (File::isAbsolutePath (subpath)
-             || subpath.startsWithChar ('$')
-             || subpath.startsWithChar ('~')
-             || (CharacterFunctions::isLetter (subpath[0]) && subpath[1] == ':'))
+        if (isAbsolutePath (subpath))
             return subpath.replaceCharacter ('\\', '/');
 
         String path1 (path.replaceCharacter ('\\', '/'));
@@ -145,4 +152,15 @@ namespace FileHelpers
 
         return path1.substring (0, commonBitLength).removeCharacters ("/:").isNotEmpty();
     }
+
+    String getRelativePathFrom (const File& file, const File& sourceFolder)
+    {
+       #if ! JUCE_WINDOWS
+        // On a non-windows machine, we can't know if a drive-letter path may be relative or not.
+        if (CharacterFunctions::isLetter (file.getFullPathName()[0]) && file.getFullPathName()[1] == ':')
+            return file.getFullPathName();
+       #endif
+
+        return file.getRelativePathFrom (sourceFolder);
+    }
 }
diff --git a/extras/Introjucer/Source/Utility/jucer_FileHelpers.h b/extras/Introjucer/Source/Utility/jucer_FileHelpers.h
index 20cdbab4b7..698f14f268 100644
--- a/extras/Introjucer/Source/Utility/jucer_FileHelpers.h
+++ b/extras/Introjucer/Source/Utility/jucer_FileHelpers.h
@@ -43,6 +43,10 @@ namespace FileHelpers
     String windowsStylePath (const String& path);
 
     bool shouldPathsBeRelative (String path1, String path2);
+    bool isAbsolutePath (const String& path);
+
+    // A windows-aware version of File::getRelativePath()
+    String getRelativePathFrom (const File& file, const File& sourceFolder);
 }
 
 //==============================================================================
diff --git a/extras/Introjucer/Source/Utility/jucer_RelativePath.h b/extras/Introjucer/Source/Utility/jucer_RelativePath.h
index 83a15c56cc..305f40fed4 100644
--- a/extras/Introjucer/Source/Utility/jucer_RelativePath.h
+++ b/extras/Introjucer/Source/Utility/jucer_RelativePath.h
@@ -53,7 +53,7 @@ public:
     }
 
     RelativePath (const File& file, const File& rootFolder, const RootFolder root_)
-        : path (file.getRelativePathFrom (rootFolder).replaceCharacter ('\\', '/')), root (root_)
+        : path (FileHelpers::getRelativePathFrom (file, rootFolder).replaceCharacter ('\\', '/')), root (root_)
     {
     }
 
@@ -67,7 +67,7 @@ public:
 
     String getFileExtension() const                         { return getFakeFile().getFileExtension(); }
     bool hasFileExtension (const String& extension) const   { return getFakeFile().hasFileExtension (extension); }
-    bool isAbsolute() const                                 { return isAbsolute (path); }
+    bool isAbsolute() const                                 { return FileHelpers::isAbsolutePath (path); }
 
     RelativePath withFileExtension (const String& extension) const
     {
@@ -85,7 +85,7 @@ public:
 
     RelativePath getChildFile (const String& subpath) const
     {
-        if (isAbsolute (subpath))
+        if (FileHelpers::isAbsolutePath (subpath))
             return RelativePath (subpath, root);
 
         String p (toUnixStyle());
@@ -100,7 +100,7 @@ public:
         if (isAbsolute())
             return RelativePath (path, newRootType);
 
-        return RelativePath (originalRoot.getChildFile (toUnixStyle()).getRelativePathFrom (newRoot), newRootType);
+        return RelativePath (FileHelpers::getRelativePathFrom (originalRoot.getChildFile (toUnixStyle()), newRoot), newRootType);
     }
 
 private:
@@ -114,16 +114,6 @@ private:
         static const File currentWorkingDirectory (File::getCurrentWorkingDirectory());
         return currentWorkingDirectory.getChildFile (path);
     }
-
-    static bool isAbsolute (const String& path)
-    {
-        return File::isAbsolutePath (path)
-                || path.startsWithChar ('/') // (needed because File::isAbsolutePath will ignore forward-slashes on Windows)
-                || path.startsWithChar ('$')
-                || path.startsWithChar ('~')
-                || (CharacterFunctions::isLetter (path[0]) && path[1] == ':')
-                || path.startsWithIgnoreCase ("smb:");
-    }
 };