Fix for flipped (rotated 180º) webcam on Skype for Ubuntu

sudo apt-get install libv4l-0

sudo gedit /usr/share/applications/skype.desktop

Replace "Exec=skype" with the following.

Exec=bash -c 'LD_PRELOAD=/usr/lib/i386-linux-gnu/libv4l/v4l1compat.so skype'

Source: How To Fix Webcam Problem In Skype.

Tested on Ubuntu 12.04