I've noticed that the master server is responding with incomplete packets, if at all. Most times I have to click "get new list" 3-4 times to see a decent list of servers. I don't know who hosts it or how much is its load, but I would be willing to host a new one or host another (master2) if it will help. I propose a simple DNS round-robin, and setup a way to sync the lists between both servers. Let me know your thoughts.
For those people that don't know me, I host the Dretch*Storm server, delivering fun and entertainment to thousands of newbies for over a year.