In my case, the new Gedit version has no outline border (like a plain white piece of paper) and it bugs my eyes.
The Nautilus file manager, for some unknown reasons? My left click can no longer create a "new txt file" at that location so I end up using Gedit to write the some text first then link it to a location to save instead of the "old way left click".
In some situations, after typing something in Gedit and minimize the program Windows, I cannot click at the Desktop icons anymore. It just like the desktop is frozen!

In general, the update well I don't know much about the differences but the Gedit and Nautilus file manager are disasters in this version (14.10) @_@