Lol@WheatstoneHolmes: How come i'm associated with polarization?
Polarization is mirrored when reflected. If the polarization is 45° before the mirror then the polarization will be 135° after reflection. This is used in planar devices and therefore they works without modifications when using displays that have 45° polarization. If polarization is either 0° or 90° the polarization is unaffected.
Lol@Yuriy: I just had to try with the iz3d and came to the same conclusion. Since i know the iz3d has 45/135° the result first made me what the f***....
But it all makes sense:
The reason why the iz3d reflected image looks proper (it actually is) is simply that the image itself also is mirrored which gives a final result of a mirrored but proper image in stereo.
Try mirroring an anaglyph image and see. Then you'll get a L/R shift too.
I aslo now recall that a mirrored image in a glasswindow from the big rig once scared the crap out of me...