Description of problem:
Gtk-ERROR **: GTK+ 3 symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not supported
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. login in gdm
This is fixed in gnome-user-share-3.0.0-1.fc15
Discussed at the 2011-04-15 blocker bug review meeting.
This isn't a serious issue as it only adds noise to ~/.xsession-errors and could be fixed with an update.
There is a fix for this issue that was pushed to stable on 2011-04-15. If this has indeed been fixed, please close the bug.