Vista - Picture rotation problems

When I rotate a picture using third party photo editing software (irfanview)
the picture is oriented correctly in irfanview but not in the Pictures folder
in Vista. Clicking F5 doesn't fix the problem. If I rotate the picture in
the Pictures folder to try and correct the problem the picture then displays
an orientation that is the combination of the first rotation in irfanview and
the second rotation in Pictures. Any help would be greatly appreciated!