Hiya!
The gnome splash screen on my FC4t1 setup stays around after I log in, until I click in it.
If it's a known problem, please let me know which packages fix it (I can't download all 440M worth of updates through my tiny dialup). If it's not yet a known problem, let me know what you need to know to help someone diagnose the cause.
From what I remember, the problem is caused by up2date.. If you tryrunning up2date from the command line, you'll see it spit out some error message. I'm not sure, but I think the problem is addressed upon updating gnome-python2-gnomevfs.