If a user only has an area 51 account, and clicks on discussion it logs them out, when they login again and click on discussion it does the same thing. It becomes an endless circle.
So far I have it narrowed down to if you create an account on Area 51, but don't have an account on Stack Exchange this is when you experience the problem. However it seems like logging in to Area 51 should also give you access to discussion.
This makes it very hard to get new users to participate in discussion, is this a bug that will be fixed?