Spring RTS Engine

I deleted and reinstalled the new spring .70b2. when i play a bot with aai.55 i get about 10 minutes into the game and then the game boots me back to the game lobby without an error message. I looked at the aai log file and its empty. I then deleted it and played another game and the same thing happened. looked at the newly created log file and again nothing was in it. aai worked fine before the new spring. any suggestions?

when partially extending the building placement code to support water maps i found another possible rounding related crashbug - so aai 0.55 is definetly not bug-free

but usually you get an error-message - strange....