Found it - right click the blank toolbar under the ribbon and click “dock to bottom”.

Here's a response I received from AutoDesk a couple of months ago:

That helped my situation.

That issue has reappeared for me as well. It happened to me a few months ago and I found these options:

This was the Augi forum:
http://forums.augi.com/showthread.ph...it+screen+jump

And here was the AutoDesk recommendation:
http://usa.autodesk.com/adsk/servlet...P=OTC-RSSSUP01

And here’s what I actually did:
http://whatrevitwants.blogspot.com/2...-2010-fix.html


I had not tried the 'dock to bottom' option, though it seems to get rid of the jump. I don't like my tool/command options being so far from the ribbon though. I'm even less likely to notice when there's a little checkbox for 'Delete Inner Segment', etc.

So, for the record, the last option I listed worked well. I'd still recommend copying/backing up any files before modifying.

Hope that helps,

-josh


FOLLOW UP: Just fixed this issue by exporting Autodesk and subfolders in REGEDIT (see link above); then I selectively deleted the entries under Revit/Autodesk Revit Arch.../Profiles. I left AllAnavDialogs and OpenSaveAnavDialogs. This did the trick and stopped the jumping tool bars. All of this was done in Windows 7 (64 bit) and with a Revit Architecture 2010.