Is there a way to turn off the Preview option for the pager? This was possible in earlier KDE releases, but I can not locate this option in 4.1.3 (Fedora Core 10)

I cannot find a setting for that in plasma-appletsrc
Btw, if Im not getting this wrong, you are refering to the pager (workspace switcher) applet tooltips, tight?

Thanks for the reply.

Yes, the desktop work spaces, that install, by default with 4.

Guess the new interface did not carry them forward. I am upgrading from FC8, and I see a lot of differences. Is there a good place to read an overview of these changes?

Check the Fedora 10 release notes: http://docs.fedoraproject.org/release-notes/f10/