did you solve?
I'm having the same troubles on my Slackware 9.1...
I also had to copy themes' engines from the old 2.2 directory to the new one, and I have troubles with SVG graphics, too: it says that it couldn't find mime-type of images, and Gnome-Panel doesn't show SVG icons, but Nautilus (on desktop) does...
And, one more, panel-applet "Modem-lights" (I think in English are so-called, I use the Italian Versione and the name of the applet is "Spie Modem") doesn't work: it allow me to connect and disconnect but I can't see connection-status, flashing lights and graphics.
Can anybody help me?
Thanks, and sorry for my English, I'm Italian...
PS: Oh, I forgot... Some other troubles
- Fonts got worse, but I think it happened because of my adventures with FreeType
- In gnome-terminal I can't use anymore CTRL+SHIFT+T to open a new tab, it seems I don't press CTRL button, but I do!