There was a brief mention of this on the Atari forums for UT, http://www.ina-community.com/forums/...=&threadid=218
They only briefly mentioned it
"3.) Error on file moves when downloading maps, mutators and such from a server. [Occurs for all users(?) Resolved by sym-linking the Cache, Maps and Textures directories to your home directory.] "
I added the following symlinks and then ran the latest patch v2225 and that seemed to fix it. Honestly, it could have been the patch that fixed it and the symlinks could have been unnecessary.
(Inside of my home are these links)
Cache -> /home/jason/.ut2003/Cache/
Maps -> /usr/local/games/ut2003/Maps/
Textures -> /usr/local/games/ut2003/Textures/
Hope this helps