Fix open/save window importing BibTeX files without UTF-8 BOM in auto mode -- just default to UTF-8

chrome/content/zotero/xpcom/file.js

@@ -245,12 +245,14 @@ Zotero.File = new function(){
 	 */
 	function getCharsetFromFile(file, mimeType, callback, args){
 		if (!file || !file.exists()){
-			return false;
+			callback(false, args);
+			return;
 		}
 		
-		if (mimeType.substr(0, 5)!='text/' ||
+		if (mimeType.substr(0, 5) != 'text/' ||
-			!Zotero.MIME.hasInternalHandler(mimeType, this.getExtension(file))){
+				!Zotero.MIME.hasInternalHandler(mimeType, this.getExtension(file))) {
-			return false;
+			callback(false, args);
+			return;
 		}
 		
 		var browser = Zotero.Browser.createHiddenBrowser();

chrome/content/zotero/xpcom/mime.js

@@ -79,7 +79,8 @@ Zotero.MIME = new function(){
 	var _externalTextExtensions = {
 		graffle: true,
 		mm: true,
-		opml: true
+		opml: true,
+		bib: true
 	};
 	
 	
@@ -324,7 +325,7 @@ Zotero.MIME = new function(){
 	function hasNativeHandler(mimeType, ext) {
 		if (mimeType.match(/^text\//)) {
 			if (isExternalTextExtension(ext)){
-				Zotero.debug('text file has extension that should be handled externally');
+				Zotero.debug(mimeType + " file has extension '" + ext + "' that should be handled externally");
 				return false;
 			}
 			return true;

chrome/content/zotero/xpcom/translate.js

@@ -1799,7 +1799,8 @@ Zotero.Translate.prototype._importSniffCharacterSet = function(callback) {
 				var me = this;
 				Zotero.File.getCharsetFromFile(this.location, "text/plain",
 					function(charset) {
-						me._charset = charset;
+						// Default to UTF-8 if no charset available
+						me._charset = charset ? charset : "UTF-8";
 						me._importDoneSniffing(charset);
 					});
 			} else {