Epic has released a new build of UT with a number of changes, some of which were quite unexpected. On the unexpected side is the MAJOR overhaul of CTF-TitanPass visuals. Epic put an enormous amount of work into using the TitanPass update to test improvements in player visibility.
Part of the fallout from this change is that community mappers that have used TitanPass assets in their maps have quite a bit of repair work to do to fix graphical errors. Go HERE to see the full changelog.