Problems with Google Chrome

I might have encountered a problem with Google Chrome. When I log in to the website with my username and password, I can visit any page without any problems in any browser. However, it seems that Google Chrome doesn't work correctly when I click on one of the groups from http://www.soctat.org/groups.
For no particular reason the website automatically reacts as if I am not a registered user but a anomous one. Did anyone of you experienced the same? Firefox and Internet Explorer do not show this bug.