Membership (logging in) causes timeouts

I am not sure where to post this bug and could not find any previous reports, probably because i'm not sure what's happening. Here's the deal;

I have signed up for drupal.org some 10 hours ago, before i signed up i had no problems with the site. Immediately after i signed up and logged in i got server time outs, Chrome is reporting error 324, Firefox only shows white pages. Reloading a page several times will eventually show the page as it is supposed to, sometimes without correct layout (no css?). Page loading seems to take forever.

At first i thought this must be some network issue, perhaps even something at my end. But then i logged out and surprise(!) the drupal.org site is fully functional (as far as anonymous functionality goes of course) and quick again!

I have now tested a few times, over several hours (thinking perhaps the site was indeed busy). The error seems consistent, once logged in drupal.org is extremely sluggish and presents empty pages 8 out of 10 times. As soon as i log out this behaviour is gone.

All i can hope for is this report getting through the first time ...