I have this problem also. Started yesterday on Retina MacPro. Have 27" iMac, circa 2010, running same versions and it does NOT exhibit this problem.
http://forums.technicpack.net/threads/upside-down-and-mirror-image.53288/#post-438716
Title: Upside down and mirror image
Version: 1_0_3
OS: OSX Mountain Lion
Java Version: 7
Description of Problem:
This just started. After technic launcher (tekkit) the minecraft start screen is upside down and mirror image.
Error Messages:
I cannot find an error message relevant to the problem in the log.
Error Log: