willhandley spewed out this bit, and i'll scatter a few bits myself:
[color=blue]
> This does not happen every time, but frequently enough to be
> annoying. I click on one of the little triangles in the folder tree
> in the left-hand pane to expand a folder, and nothing happens; I get
> the spinning circle icon and it sits there for a very long time
> before finally expanding. I've learned that I can go ahead and drill
> down in the right-hand pane while this is going on, but I'd like to
> turn off whatever new "feature" is causing this. There's no physical
> reason this should happen; this is a Dell Precision 690 with 4 gigs
> of memory and a very fast 10K-rpm hard drive. When the folders do
> expand right away, which is most of the time, it is instantaneous.
> Running Vista Ultimate x64.[/color]

My setup did this same thing, it was caused by my SATA drivers getting
fouled up in some way or another. I suspect because I allowed windows update
to update my nvidia drivers with the one that windows update provides. Look
for "nvstor32 errors" or "nvstor errors" in the event viewer. I reinstall my
SATA drivers with the ones from Nvidia website to clear my problem up.

I would imagine this could also be caused by something using 100% of your
CPU as well. You can check that using the "Task Manager".

--
Mhzjunkie

1 PRINT "Windows Vista ERROR"
GOTO 1
END