diff --git a/node_modules/ace/lib/ace/edit_session.js b/node_modules/ace/lib/ace/edit_session.js
index 263592d8..32db04b9 100644
--- a/node_modules/ace/lib/ace/edit_session.js
+++ b/node_modules/ace/lib/ace/edit_session.js
@@ -1195,19 +1195,23 @@ EditSession.$uid = 0;
             return isUndo ? delta.action !== "insert" : delta.action === "insert";
         }
 
-        var delta = deltas[0];
         var range, point;
-        var lastDeltaIsInsert = false;
-        if (isInsert(delta)) {
-            range = Range.fromPoints(delta.start, delta.end);
-            lastDeltaIsInsert = true;
-        } else {
-            range = Range.fromPoints(delta.start, delta.start);
-            lastDeltaIsInsert = false;
-        }
+        var lastDeltaIsInsert;
 
         for (var i = 1; i < deltas.length; i++) {
-            delta = deltas[i];
+            var delta = deltas[i];
+            if (!delta.start) continue; // skip folds
+            if (!range) {
+                if (isInsert(delta)) {
+                    range = Range.fromPoints(delta.start, delta.end);
+                    lastDeltaIsInsert = true;
+                } else {
+                    range = Range.fromPoints(delta.start, delta.start);
+                    lastDeltaIsInsert = false;
+                }
+                continue;
+            }
+            
             if (isInsert(delta)) {
                 point = delta.start;
                 if (range.compare(point.row, point.column) == -1) {
diff --git a/package.json b/package.json
index f7bfb8ff..75f1187a 100644
--- a/package.json
+++ b/package.json
@@ -96,20 +96,20 @@
         "c9.ide.newresource": "#981a408a7b",
         "c9.ide.openfiles": "#7fa4a97fed",
         "c9.ide.preview": "#8f87ff2f6a",
-        "c9.ide.preview.browser": "#cec211a76a",
+        "c9.ide.preview.browser": "#c5b9a129de",
         "c9.ide.preview.markdown": "#bc846e1562",
         "c9.ide.pubsub": "#a85fb27eca",
         "c9.ide.readonly": "#e67bb593bd",
         "c9.ide.recentfiles": "#7c099abf40",
         "c9.ide.remote": "#301d2ab519",
         "c9.ide.processlist": "#2b12cd1bdd",
-        "c9.ide.run": "#13a49e681a",
+        "c9.ide.run": "#d89ab4cd5a",
         "c9.ide.run.build": "#0598fff697",
-        "c9.ide.run.debug.xdebug": "#70aeb327c0",
+        "c9.ide.run.debug.xdebug": "#518f5a0c66",
         "c9.ide.save": "#9461acd953",
         "c9.ide.scm": "#930a9e6f00",
         "c9.ide.terminal.monitor": "#e26502f0df",
-        "c9.ide.test": "#5b4c724bf6",
+        "c9.ide.test": "#8f21f662d3",
         "c9.ide.test.mocha": "#fc053b23d2",
         "c9.ide.theme.flat": "#92cda0fb40",
         "c9.ide.threewaymerge": "#229382aa0b",
diff --git a/plugins/c9.ide.plugins/debug.js b/plugins/c9.ide.plugins/debug.js
index 6dd9f0c1..1c46a254 100644
--- a/plugins/c9.ide.plugins/debug.js
+++ b/plugins/c9.ide.plugins/debug.js
@@ -43,7 +43,7 @@ define(function(require, exports, module) {
         var plugins = [];
         
         var ENABLED = c9.location.indexOf("debug=2") > -1;
-        var HASSDK = experimental.addExperiment("sdk", false, "SDK/Load Custom Plugins");;
+        var HASSDK = ENABLED || experimental.addExperiment("sdk", false, "SDK/Load Custom Plugins");
         
         var reParts = /^(builders|keymaps|modes|outline|runners|snippets|themes)\/(.*)/;
         var reModule = /(?:_highlight_rules|_test|_worker|_fold|_behaviou?r)\.js$/;
diff --git a/plugins/c9.ide.plugins/installer.js b/plugins/c9.ide.plugins/installer.js
index 5e166437..6500723f 100644
--- a/plugins/c9.ide.plugins/installer.js
+++ b/plugins/c9.ide.plugins/installer.js
@@ -27,7 +27,8 @@ define(function(require, exports, module) {
         var plugin = new Plugin("Ajax.org", main.consumes);
         var emit = plugin.getEmitter();
         
-        var HASSDK = experimental.addExperiment("sdk", false, "SDK/Load Custom Plugins");
+        var DEBUG_MODE = c9.location.indexOf("debug=2") > -1;
+        var HASSDK = DEBUG_MODE || experimental.addExperiment("sdk", false, "SDK/Load Custom Plugins");
         
         var installing;
         
diff --git a/plugins/c9.ide.plugins/loader.js b/plugins/c9.ide.plugins/loader.js
index 8d4e8f25..ab8ad3b9 100644
--- a/plugins/c9.ide.plugins/loader.js
+++ b/plugins/c9.ide.plugins/loader.js
@@ -28,8 +28,9 @@ define(function(require, exports, module) {
         var plugin = new Plugin("Ajax.org", main.consumes);
         // var emit = plugin.getEmitter();
         
-        var ENABLED = experimental.addExperiment("plugins", false, "SDK/Load Plugins From Workspace");
-        var HASSDK = experimental.addExperiment("sdk", false, "SDK/Load Custom Plugins");
+        var DEBUG_MODE = c9.location.indexOf("debug=2") > -1;
+        var ENABLED = DEBUG_MODE || experimental.addExperiment("plugins", false, "SDK/Load Plugins From Workspace");
+        var HASSDK = DEBUG_MODE || experimental.addExperiment("sdk", false, "SDK/Load Custom Plugins");
         
         var plugins = options.plugins;
         var loadFromDisk = options.loadFromDisk
diff --git a/plugins/c9.ide.plugins/packages.js b/plugins/c9.ide.plugins/packages.js
index 310865d1..955a820f 100644
--- a/plugins/c9.ide.plugins/packages.js
+++ b/plugins/c9.ide.plugins/packages.js
@@ -31,7 +31,8 @@ define(function(require, exports, module) {
         var emit = handle.getEmitter();
         emit.setMaxListeners(1000);
         
-        var HASSDK = experimental.addExperiment("sdk", false, "SDK/Load Custom Plugins");
+        var DEBUG_MODE = c9.location.indexOf("debug=2") > -1;
+        var HASSDK = DEBUG_MODE || experimental.addExperiment("sdk", false, "SDK/Load Custom Plugins");
         
         function focusOpenPackages(){
             var pages = tabs.getTabs();