I am not sure if this is part of the issues you know that already exist but when I tried to put in my address in the user control area I got this Mysql Error.
I cannot really do any testing of buying, wanted, etc as it wont let me proceed without the address...
This is fixed in Beta 2. I think this is only an issue for when you insert a new address with no defaults added.
You can go to your addresses page now, and you will see one address. If you set them as your default buyer and seller address (options below the address) that should fix your specific issue when adding new addresses until we get Beta 2 sorted. I'm hoping I can the fixes I've done ready for release tonight.