Fair warning: 7zip support in 0.147 is trashing memory

: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/benbruscella/www.messdev.org/includes/unicode.inc on line 311.

On Mac OS X it’s nice enough to crash right away; on Windows/Linux/BSD it’s affecting god knows what inside of MAME/MESS/UME. You should stick with plain .zip if possible until this has been resolved.
(Also to be clear: I wrote “0.147″ above, but this includes all versions since .7z was added).