Great! As far as I am concerned, this has solved the issue.
Thank you, Sambauers!
@tomdebruin: what about you?
Same problem here. There are no mismatches between my manually set cookie paths. However, is there a list of all cookie paths that could be set?
All I did was upgrading to RC1. Before that, with the latest alpha-release, this problem did not occur.
I am using WP 2.7.1 (not WPMU).
So what next?
Is this an issue of configuring wp 2.6 and bbpress 0.9.0.2 correctly to fix this problem?
Or is a software-update necessary?