Epic has released
a patch for Unreal Tournament 2003, updating the Windows retail version of the game to v2136 (a Linux version is expected shortly). FileShack has the long list of changes, here's some more information about the patch
This patch will overwrite your user.ini and ut2003.ini files, because it
adds some important new properties to these configuration files.
To use it with windows dedicated servers, rename it to
ut2003-winpatch2136Release.zip,
open and extract it to a temporary location with winzip, and copy the system
directory (subdirectory of UT2003patch) into the system subdirectory of your
server installation.
We will be releasing an updated version of UDebugger and updated .uc files
for mod developers shortly.