Operating system and graphics card
Win7 64 Ult SP1
GeForce GTX580 1.5GB
Short description of error
I'm attaching a video to better demonstrate the bug.
Basically, after first use of the command view3d.select (as demonstrated in the video) to add to selection, the initial behavior is broken and the add to selection behavior is locked.
Please refer to video for better demo of the bug.
Not demonstarted in the vid, identical behavior applies across Object Mode and Edit Mode.
I'm also linking to my prefs (from the video) if you guys need it to test this behavior.
Note: Deleted CGCookie Retopology tools from the prefs as they are a paid Addon (you might get an error about that)
Exact steps for others to reproduce the error
Described in the video