Bug after battles, land becomes water

[TT2]

Hello all,

Two days ago, I bought RotS. All fine and dandy, I thought, till I fought a battle and was returned to the campaign map, there everything that was land, became water, only the villages/units weren't drowning (and weren't modified in any way).

So what can be the problem?
I already tried to check the integritry of the local files but that didn't help.

As proof, I made a screenshot of it:
2012-04-15_00001.jpg

Does anybody have the same problem?
And if so, found an solution?

I played it on a Sam SyncMaster 2433Bw with a ATi Radeon 4850.

[DenmarkRules]

Try to update all drivers

But funny bug

[racerdog90]

Hahah, thats great.... what you can also try doing is clearing your cache so the game has to update, yes it will take a little while but hey, if it helps, so what?