Image data in custom properties- fails in windoze standalone

[Tim Lambert]

Hi
Using 4.5.3 and have a single cd with 20 or 30 itms in a selectable list. Clicking on a line brings up the corresponding image by setting the imagedata to the corresponding custom prop of the cd. In OSX and on the iPad simulator this works fine. The standalone OSX also works fine, but the Windoze version just won't work (can't shift images)
IS there a know problem with 4.5.3 windows standalones or is there just some arcane bug that I have to hunt down.
TIA
Tim