See in this screeshot with the nVidia XP skin by Pixtudio:

http://skins.wincustomize.com/Pixtudio/wb/ss_nvidiaxp_wb.jpg

Well, there is a thin green line on top of the taskbar bordering it. When I apply the skin, it's there. But how come I lose that green line upon a reboot?

Another example is the thin white line bordering the top of the taskbar on the revel skin:

http://skins.wincustomize.com/SnidelyWhiplash/wb/revel.jpg

This happens with every skin . I have to be overlookin something. Any ideas?