Alot of people don't know this, but I 224v patch actually fixes Unreal Editor, and runs very well with almost every graphics card released. Including the new Ti4600 cards.
I would suggest, patching your Unreal to 224v, if that doesn't solve it, use the UedFix and patch 224v with that...If none of that doesn't work...I would reinstall Unreal (preferrably 220retail disc) and then patch it to 224, and see if this solves your problem. We have to remember this is a very OLD game, and it is well documented in terms of bugs, and glitches...so be patient, and keep plugging away at Ued...good luck to you.
