Comment 10 for bug 862662

Under a "guest" session (unity, ubuntu 12.10), GTK applications do trigger the busy cursor when opening a file from nautilus or the dash. So does a live session, as mentionned there:
http://askubuntu.com/questions/126872/how-to-get-the-lost-busy-cursor-when-opening-file-app-back, in live sessions

So I suppose that the package "startup-notification" is affected. It seems that the maintener of the package, Josselin Mouette, is not active anymore though.