diff --git a/boot/boot.js b/boot/boot.js
index fbac37d77..6e99863f8 100644
--- a/boot/boot.js
+++ b/boot/boot.js
@@ -2133,6 +2133,7 @@ $tw.loadWikiTiddlers = function(wikiPath,options) {
 			fileInfo = $tw.boot.files[title];
 			if(fileInfo.isEditableFile) {
 				relativePath = path.relative($tw.boot.wikiTiddlersPath,fileInfo.filepath);
+				fileInfo.originalpath = relativePath;
 				output[title] =
 					path.sep === "/" ?
 					relativePath :
diff --git a/core/modules/commands/savewikifolder.js b/core/modules/commands/savewikifolder.js
index f5cfb9cd7..cd4b5f26e 100644
--- a/core/modules/commands/savewikifolder.js
+++ b/core/modules/commands/savewikifolder.js
@@ -167,10 +167,10 @@ WikiFolderMaker.prototype.saveTiddler = function(directory,tiddler) {
 	}
 	var fileInfo = $tw.utils.generateTiddlerFileInfo(tiddler,{
 		directory: path.resolve(this.wikiFolderPath,directory),
-		wiki: this.wiki,
 		pathFilters: pathFilters,
 		extFilters: extFilters,
-		originalpath: this.wiki.extractTiddlerDataItem("$:/config/OriginalTiddlerPaths",title, "")
+		wiki: this.wiki,
+		fileInfo: {}
 	});
 	try {
 		$tw.utils.saveTiddlerToFileSync(tiddler,fileInfo);
diff --git a/core/modules/utils/filesystem.js b/core/modules/utils/filesystem.js
index b7fe2156c..230090840 100644
--- a/core/modules/utils/filesystem.js
+++ b/core/modules/utils/filesystem.js
@@ -213,13 +213,13 @@ Options include:
 	extFilters: optional array of filters to be used to generate the base path
 	wiki: optional wiki for evaluating the pathFilters,
 	fileInfo: an existing fileInfo to check against
-	originalpath: a preferred filepath if no pathFilters match
 */
 exports.generateTiddlerFileInfo = function(tiddler,options) {
 	var fileInfo = {}, metaExt;
 	// Propagate the isEditableFile flag
-	if(options.fileInfo) {
-		fileInfo.isEditableFile = options.fileInfo.isEditableFile || false;
+	if(options.fileInfo && !!options.fileInfo.isEditableFile) {
+		fileInfo.isEditableFile = true;
+		fileInfo.originalpath = options.fileInfo.originalpath;
 	}
 	// Check if the tiddler has any unsafe fields that can't be expressed in a .tid or .meta file: containing control characters, or leading/trailing whitespace
 	var hasUnsafeFields = false;
@@ -247,7 +247,7 @@ exports.generateTiddlerFileInfo = function(tiddler,options) {
 			fileInfo.hasMetaFile = true;
 		}
 		if(options.extFilters) {
-			// Check for extension override
+			// Check for extension overrides
 			metaExt = $tw.utils.generateTiddlerExtension(tiddler.fields.title,{
 				extFilters: options.extFilters,
 				wiki: options.wiki
@@ -279,8 +279,7 @@ exports.generateTiddlerFileInfo = function(tiddler,options) {
 		directory: options.directory,
 		pathFilters: options.pathFilters,
 		wiki: options.wiki,
-		fileInfo: options.fileInfo,
-		originalpath: options.originalpath
+		fileInfo: options.fileInfo
 	});
 	return fileInfo;
 };
@@ -292,8 +291,7 @@ Options include:
 	wiki: optional wiki for evaluating the extFilters
 */
 exports.generateTiddlerExtension = function(title,options) {
-	var self = this,
-		extension;
+	var extension;
 	// Check if any of the extFilters applies
 	if(options.extFilters && options.wiki) { 
 		$tw.utils.each(options.extFilters,function(filter) {
@@ -319,11 +317,10 @@ Options include:
 	fileInfo: an existing fileInfo object to check against
 */
 exports.generateTiddlerFilepath = function(title,options) {
-	var self = this,
-		directory = options.directory || "",
+	var directory = options.directory || "",
 		extension = options.extension || "",
-		originalpath = options.originalpath || "",
-		filepath;	
+		originalpath = (options.fileInfo && options.fileInfo.originalpath) ? options.fileInfo.originalpath : "",
+		filepath;
 	// Check if any of the pathFilters applies
 	if(options.pathFilters && options.wiki) {
 		$tw.utils.each(options.pathFilters,function(filter) {
@@ -336,7 +333,7 @@ exports.generateTiddlerFilepath = function(title,options) {
 			}
 		});
 	}
-	if(!filepath && originalpath !== "") {
+	if(!filepath && !!originalpath) {
 		//Use the originalpath without the extension
 		var ext = path.extname(originalpath);
 		filepath = originalpath.substring(0,originalpath.length - ext.length);
@@ -345,27 +342,35 @@ exports.generateTiddlerFilepath = function(title,options) {
 		// Remove any forward or backward slashes so we don't create directories
 		filepath = filepath.replace(/\/|\\/g,"_");
 	}
-	//If the path does not start with "." or ".." and a path seperator, then
+	// Replace any Windows control codes
+	filepath = filepath.replace(/^(con|prn|aux|nul|com[0-9]|lpt[0-9])$/i,"_$1_");
+	// Replace any leading spaces with the same number of underscores
+	filepath = filepath.replace(/^ +/,function (u) { return u.replace(/ /g, "_")});
+	//If the path does not start with "." or ".." && a path seperator, then
 	if(!/^\.{1,2}[/\\]/g.test(filepath)) {
 		// Don't let the filename start with any dots because such files are invisible on *nix
-		filepath = filepath.replace(/^\.+/g,"_");
+		filepath = filepath.replace(/^\.+/g,function (u) { return u.replace(/\./g, "_")});
+	}
+	// Replace any Unicode control codes
+	filepath = filepath.replace(/[\x00-\x1f\x80-\x9f]/g,"_");
+	// Replace any characters that can't be used in cross-platform filenames
+	filepath = $tw.utils.transliterate(filepath.replace(/<|>|~|\:|\"|\||\?|\*|\^/g,"_"));
+	// Replace any dots or spaces at the end of the extension with the same number of underscores
+	extension = extension.replace(/[\. ]+$/, function (u) { return u.replace(/[\. ]/g, "_")});
+	// Truncate the extension if it is too long
+	if(extension.length > 32) {
+		extension = extension.substr(0,32);
 	}
 	// If the filepath already ends in the extension then remove it
 	if(filepath.substring(filepath.length - extension.length) === extension) {
 		filepath = filepath.substring(0,filepath.length - extension.length);
 	}
-	// Remove any characters that can't be used in cross-platform filenames
-	filepath = $tw.utils.transliterate(filepath.replace(/<|>|~|\:|\"|\||\?|\*|\^/g,"_"));
 	// Truncate the filename if it is too long
 	if(filepath.length > 200) {
 		filepath = filepath.substr(0,200);
 	}
-	// Truncate the extension if it is too long
-	if(extension.length > 32) {
-		extension = extension.substr(0,32);
-	}
-	// If the resulting filename is blank (eg because the title is just punctuation characters)
-	if(!filepath) {
+	// If the resulting filename is blank (eg because the title is just punctuation)
+	if(!filepath || /^_+$/g.test(filepath)) {
 		// ...then just use the character codes of the title
 		filepath = "";	
 		$tw.utils.each(title.split(""),function(char) {
@@ -386,14 +391,15 @@ exports.generateTiddlerFilepath = function(title,options) {
 		count++;
 	} while(fs.existsSync(fullPath));
 	// If the last write failed with an error, or if path does not start with:
-	//	the resolved options.directory, the resolved wikiPath directory, or the wikiTiddlersPath directory, 
-	//	then encodeURIComponent() and resolve to tiddler directory
-	var writePath = $tw.hooks.invokeHook("th-make-tiddler-path",fullPath),
+	//	the resolved options.directory, the resolved wikiPath directory, the wikiTiddlersPath directory, 
+	//	or the 'originalpath' directory, then encodeURIComponent() and resolve to tiddler directory.
+	var writePath = $tw.hooks.invokeHook("th-make-tiddler-path",fullPath,fullPath),
 		encode = (options.fileInfo || {writeError: false}).writeError == true;
 	if(!encode) {
-		encode = !(fullPath.indexOf(path.resolve(directory)) == 0 ||
-			fullPath.indexOf(path.resolve($tw.boot.wikiPath)) == 0 ||
-			fullPath.indexOf($tw.boot.wikiTiddlersPath) == 0);
+		encode = !(writePath.indexOf($tw.boot.wikiTiddlersPath) == 0 ||
+			writePath.indexOf(path.resolve(directory)) == 0 ||
+			writePath.indexOf(path.resolve($tw.boot.wikiPath)) == 0 ||
+			writePath.indexOf(path.resolve($tw.boot.wikiTiddlersPath,originalpath)) == 0 );
 		}
 	if(encode) {
 		writePath = path.resolve(directory,encodeURIComponent(fullPath));
diff --git a/plugins/tiddlywiki/filesystem/filesystemadaptor.js b/plugins/tiddlywiki/filesystem/filesystemadaptor.js
index 5b2eda092..0ed686c84 100644
--- a/plugins/tiddlywiki/filesystem/filesystemadaptor.js
+++ b/plugins/tiddlywiki/filesystem/filesystemadaptor.js
@@ -53,7 +53,8 @@ It is the responsibility of the filesystem adaptor to update this.boot.files for
 */
 FileSystemAdaptor.prototype.getTiddlerFileInfo = function(tiddler,callback) {
 	// Always generate a fileInfo object when this fuction is called
-	var title = tiddler.fields.title, newInfo, pathFilters, extFilters;
+	var title = tiddler.fields.title, newInfo, pathFilters, extFilters,
+		fileInfo = this.boot.files[title];
 	if(this.wiki.tiddlerExists("$:/config/FileSystemPaths")) {
 		pathFilters = this.wiki.getTiddlerText("$:/config/FileSystemPaths","").split("\n");
 	}
@@ -65,8 +66,7 @@ FileSystemAdaptor.prototype.getTiddlerFileInfo = function(tiddler,callback) {
 		pathFilters: pathFilters,
 		extFilters: extFilters,
 		wiki: this.wiki,
-		fileInfo: this.boot.files[title],
-		originalpath: this.wiki.extractTiddlerDataItem("$:/config/OriginalTiddlerPaths",title,"")
+		fileInfo: fileInfo
 	});
 	callback(null,newInfo);
 };