Got a Windows 2000 Server that displays blank Explorer windows until you refresh or right click inside them? Recently updated to 2 CPUs (and installed the Multiprocessor HAL)?
You need Patch KB:328310 (MS02-071), even if you've installed it already.
See KB:240855.
3 pages link to WindowsNotes:
lib/main.php:944: Notice: PageInfo: Cannot find action page