1) goto http://collab.sakaiproject.org
2) Login; in this case with an account that is part of admin.
3) Goto Worksite Setup.
4) Select "show 100 iterms per page"; there are currently 95 sites on Collab.
5) IE progress bar runs for awhile, then page refreshes and you find yourself logged out staring at the gateway page again.
If you select a different number, such as show 200 or show 50, then you get the correct list back.