Re: mo file uploading broke my 1.2
Well, it might. All those strings you translate get put into memory at run-time. 20Mb is extremely small for a WordPress/BuddyPress site especially if on a shared server.
Plus, BuddyPress isn’t supported on WordPress 3.0-alpha because, obviously, it’s in alpha. WordPress 3.0-alpha might have huge memory leaks which could be giving you this problem. I would urge you to stick to WP or WPMU 2.9.* for now