[PROBLEM] Xbian update brakes installation

[armf]

Hi,

I had installed the latest version available through the xbian installer. Playing MKV with DTS caused audio drops every few minutes for a few seconds. I thought an update would fix that.
Calling "update all" in the xbian settings dialog started an update sequence. It ended with an error and now xbian doesn't boot up anymore but gets stuck at "starting xbmc"...
Any ideas what to do? I'm sick of reinstalling xbian again and again because it keeps on getting fucked up by the updates...

Thanks