Sorry you're having problems with the build. Could you post a Media Center log file (Help / Logging / Report problem...)?
One thing you could try in case the problem lies with your library, is to clear your library (after backing it up), then re-import your media using build 219 and see if stability is improved.
Looking at your previous posts, you were having an issue with genres not importing right for some Apple lossless files you have. Is this still a problem? If so, maybe you could send me (via Dropbox?) one of these files and I'll take a look at it.