[ptg]

I get this too, though for me it happens on the 'default' Normandy map. At first I though it was because I had the map loaded up with too many objects, but it seems it may be a wider issue.

Replace MG_SND.DLL and MG_SND_SSE.dll from 4.08m

So you mean take these from 4.08 and replace them in your 4.09 install?