2011-11-27, 09:13
The August Compiled XBMC versions are when they were in the middle of the JSON changes so those versions have always been problematic to say the least. I'm not 100% sure if that's the root of your issues and I don't use Ubuntu for X on any of my systems, but my first suggestion is to download or compile a newer version (make sure it's AFTER Sept. 15 to be safe).
If that doesn't help, you can feel free to PM me and I can look more into your issue.
If that doesn't help, you can feel free to PM me and I can look more into your issue.