After applying the latest hotfixes that MS released, we found one of our
E2k3 OWA servers was getting the dreaded 'Loading...' error in the task pain.
After digging thru the KB I found this article:
Now in our case, the cause did not match exactly as the FE server was upgraded
to sp1 first then sp2 and the BE server was already running sp2. But... copying
the new folder from the BE to the FE resolved the issue.
Just an FYI if you run in to this issue.