Fixing .Net 2.0 Not Implemented Error in Linux Wine - e.g. Crossed out Boxes in the Menu in Photomatix

If you've used Microsoft .Net inside WINE, you may have come across this issue: Instead of e.g. a slider bar showing in the menu of an application, you see a box with a red cross inside it. The fix is very, very easy with winetricks, simply execute:
winetricks gdiplus


This works nicely, e.g. for HDRSoft Photomatix 4.1 in Wine 1.2.2.