Shamelessly bumping this thread as the issue still seems unresolved.

FWIW my db file is close to 4GB with just 74 movie files, a tad over 16,500 music files and no play lists.

I realize adrian has kindly provided his php binary in a post above, but for those of us who don't want to go through installing and configuring php, sqlite, etc for the sole purpose of reducing the mezzmo database file (self-defeating if you have to install something to reduce disk space usage), there doesn't seem to be much of an option right now (unless of course some kind soul could convert that php to a vbs script for other to run?).

So is there a real solution on the horizon for this?