Due to know problem of wrongly installed webcam’s in some laptops, picture may appear up side down. To solve this problem in Skype under linux, make shortcut of Skype on desktop (Mint 11 and previous) or go to /usr/share/applications in Mint 12 (open as root), right mouse click and add to command line this:

env LD_PRELOAD=/usr/lib32/libv4l/v4l1compat.so skype

Now restart Skype 🙂