OK, I just compiled my own game.qvm, and it works with tjw's server after all. I'm sticking by my notion that the game.qvm on Risujin's website is not the right one, and as a consequence, providing the following:
http://www.bandstand.org.uk/~benm/trem/custom-builds/balance.qvmDownload, rename to game.qvm, put it in the right place and
use tjw's tremded not tremulous.ub
That should work fine, and with any luck Risujin will either explain or replace the website's QVM and I can take that one down.
Edit: Risujin posted while I had this post tucked away somewhere (I wrote it, got the VM, then pressed "submit")
I maintain that the game.qvm on the server is demonstrably
not built with the patch that is hosted on your website. So please, can you recompile the VM and check, because I'm sure something has gone very wrong here.