Also take into account that many office PCs are misconfigured, i.e. either forcibly toned down in brightness and contrast or simply because they are of low-price ranges (as obviously you don't need extreme stuff just for typing word documents and doing e-mail) ;-)
This is true but it also looks dark on my Mac as well after exporting. My office area is under construction right now so I haven't had the chance to check the CM settings. If anyone has other suggestions I will defiantly try it as soon as I can get at my computer.