Skype video appears upside down on Ubuntu 12.4 using built-in webcam ( Lenovo )
It seems that the webcam is physically positioned upside down already and needs some software workaround
1- Install "libv4l"
apt-add-repository ppa:libv4l/stable apt-get update apt-get upgrade
apt-get install libv4l-0:i386Note: if you are on a 64bit machine, you will need to install the 32bit version
2- Run Skype using this command
export LIBV4LCONTROL_FLAGS=2 && LD_PRELOAD=/usr/lib/i386-linux-gnu/libv4l/v4l1compat.so skype
Worked for me