For the longest time, on both Ubuntu and Fedora, I kept running into incomplete clipboard behavior. Basically: I’d cut or copy two files in Nautilus, paste them somewhere, and only one would show up. Sometimes copy-paste even required a “double-click” like on a garbage Mac OS just to make sure the file was actually “copied.” I always assumed it was a Gnome bug, but later found out that wasn’t the case, because I searched the Gnome bug list and nobody else seemed to have this problem… I tried copying two files in Nautilus and pasting into Gedit, no problem at all — it really was the contents of both files. But pasting in Nautilus would lose one. What the hell! Eventually I narrowed it down to the Gpaste extension, since I use it on both Fedora and Ubuntu, and it’s directly related to the clipboard.