This problem has been way too chronic. I purchased a copy of UT2003, installed it on my Linux system, immediately played online with some server in Tokyo.
A few weeks later I patched myself to the current release and now play on a Zark Snipers UT2003 server.
I still miss all of the great fun I had playing UT when things worked. I still keep my UT installation. But UT2003 has been stable.
For other UTers that cannot get satisfaction with all of the hoops you have to jump through just to play UT --- I recommend going to UT2003.
Fancy uninstalls and reinstalls and non-standard file copying and retrieving versions of file from unavailable releases is not a solution. A game must simply work for it to be useful and fun.