suddenly working on FF4 RC Rated 5 out of 5 stars
As it says, Not Compatible with FF4. I didn't uninstall it though. And FF4 refused to open my saved xpi. But just now I installed this theme:
Office Black :: Add-ons for Firefox
And after the restart it suddenly appeared. Yay, I love it!
BTW, after getting Office Black, not only did this Googlebar come back, but so did FEBE, Nightly Tester Tools, CopyURL+, Cacheviewer and Copy All URLs. Maybe more too that I just haven't noticed yet. ELECTRONS!