admin:
We experience some troubles with session Time-out errors. A temporary solution is to disable cookies but this is not really an option. Strange enough it doesn't happen with Firefox 1.5 and better. Might be an IE problem but we're not sure. Still, we are working on this got get this problem solved as soon as possilbe. Please bear with us!
Edit: Resubmitting your post is just a workaround... Just got that error too. Might be server related (Damn!)