Segmentation fault

hey, ever since Hydrogen went beta a few weeks ago, I can't use it without it crashing or popping or "can't start jack server", or "server is down" yet jack is running fine.

svn464 now and it crashing... Just launched it again and got this: Jack driver: server shutdown but jack is still running and other apps are using it fine.

Tried restarting the driver under Preferences and this is what happened:

cannot read response from jack server (No such file or directory)
ALSA lib pcm_dmix.c:1008:(snd_pcm_dmix_open) unable to open slave
Segmentation fault