What video renderer do you use? Also I would try deleting the map and all of it dependencies and re-downloading. Make sure to run cache cleaner first before you go looking for the files.
They are:
.\maps\DM-[BBST]-Artic.unr
.\music\pb_totalizator.umx
.\textures\[BBST]-Oil.utx
.\system\Industrial_Pack1.u
Also after you re-download it, run cache cleaner again. Other things to try will be change / update video renderer. Also you can try moving the user.ini and unrealtournament.ini out of the system folder (don't delete) and let the game re-create them to see if there is something corrupt in one of them. Then move back one at a time to see what file is bad. Let me know.
You can still edit your posts withing an hour. We had an issue with people coming back moths later and removing entire threads so editing after an hour is disabled for this reason.