shared-mime-info-0.17-1 is currently in updates-testing.
I learned that there are two problems with it:
1) .ps is not properly recognized as PostScript (this is fixed in cvs)
2) xml files no longer get their proper icon, since text/xml got changed
I recommend to wait with pushing 0.17-1 until these are fixed.
I hear that the recommended fix for 2) is to add a link to the icon theme.
Fixes are in shared-mime-info-0.17-1.fc5.1 and gnome-icon-theme-2.14.2-1.fc5.1
As this is fixed, closing.