hey just to let ya know if you use a webbrowser control, and you also have install internet explorer 7 you might get some error about the ieframe.dll not found.
to fix this just uninstall internet explorer 7 :), that will take you back to the old ie 6 and you wont have that error no more.
somehow ie 7 damages the files or do something i dont know but tha was the solution i found