On startup, rdesktop causes the following error message to be appended to ~/.xsession-errors: Gtk-Message: Failed to load module "pk-gtk-module" pygtk2-2.24.0-3.fc15.x86_64 gtk-vnc-0.4.3-1.fc15.x86_64 gtk2-2.24.4-2.fc15.x86_64 gtk3-3.0.12-1.fc15.x86_64 rdesktop-1.6.0-12.fc15.x86_64 Similar errors are reported on bugs 699279, 643129, and 596072.
I'd say this is not rdestkop-related and thus a duplicate of bug #643129. Marking as such. *** This bug has been marked as a duplicate of bug 643129 ***