Gallery Extended: Cannot upload via windows

This is a crosspost from the solspace support forum [post] , I’m stuck…

Hi there, this seems weird: when I try uploading a pic from within a publish form in the CP on Mac everything works fine. If I do exactly the same on windows it says “entry has been updated” but has not. Checking in my ftp folder there is no new file. Tried this for every browser there is (IE7, Safari, FF3).

Any clues? Thanks! —mark

EDIT: Tried on multiple windows installations with same result…