F15 slow tooltip and dialogs

[Frederick N. Brier]

I made side reference to this issue in another post.  When I upgraded 
from F14 to F15 the tool tips and some dialogs became very slow.  If 
this is not the case for most people, is it possibly a side-effect of 
doing an upgrade vs a clean install?  Most everything else is okay.  
Running XFCE instead of Gnome3 is snappier, but the smart code 
completion tooltip/dialogs and Chrome's bookmark dialog are still 
painfully slow.  Thank you.

Fred