Sweet, a coder. Welcome to the forums, hope you'll have a fun time playing and learning Tremulous.
Anywho, yes as mentioned by Kaleo and others, there is no "official" patch/bugfixes for tremulous, but there are user-made clients that fixes some o the problems. Try searching up TremFusion, Mg Client, TJW's Client or such and see which one is best for you. There might not be just "one" client thats the best, because all the clients deliver something different then the other.
Anyways, hopes that helps. Cheers.