Not any more!!!
I used to have this problem until recently. I know it will probably loos so very simple but it took me quite a while to find out how to fix it.
If you play a divX movie and you see the film being reproduced upside down you have to do this at windows media player
Go to Tools -> Options -> Performance -> Advanced
Deselect "Use video mixing renderer"and voila! Case closed!
I love my self with my whole body...