Hello,
Thanks a lot for checking.
I'm running MP 1.0.2 as well, and I'm having this ever since I first started with MP.
I think your right, it might be specific to widescreen calibrated to "non-square" pixel aspect-ratio. There are a lot of screens, especially earlier plasma models, using a native 4:3 resolution to fill a 16:9 screen. MP has the great hability of adjusting pixel aspect ratio within the screen calibration... Actually I jumped to MP ages ago because of this.
Anyway, it should be easily reproduceable. Just go to screen calibration, and at the last step, pixel AR, you have to make a rectangle look square. Just make it anything greater than 1 (mine's 1.33).
Even if everything looks squezeed (just for testing), go and try to watch wide pictures fullscreen, you should see how the picture doesn't fill the screen...
Am I right?
I will look into it tonight.