unable to login to vmware community forums

For convenience: A username and password will be send to Mike (and other developers on request) by e-mail. Feel free to use it or feel free to make your own account.

How to reproduce the bug:

1. Go to http://communities.vmware.com/index.jspa
2. press "Login/Register"
3. enter e-mail address
4. enter password
5. click "Join discussions, "
6. click on "VMware Player"
7. click on "Start a discussion"

And then you are logged out. (You don't have to post anything, you won't come that far. You'll never see the forum input boxes.)

It must be a Tor Browser related bug, because with Firefox (Iceweasel) the login works.