PP CS6 Media Browser displays thumbnails upside down

Hi,

I'm using a 2010 MacBook Pro 17" 3.06 GHz, 4GB RAM,

NVIDIA GeForce 9400M GT, OS 10.6.8 and PP CS6.02.

When I'm viewing stills in media browser, it's displaying many of the thumnails upside down and side ways.

Not sure what else to say about it or do.

Any ideas?

Thanks in advance,

Simon.