I have tried to make image plots from image matices - an upright one and vertically flipped one - imported from a jpeg photo; but I couldn't reproduce the problem. Could you please sending you Origin project file by the way described at: http://www.originlab.com/index.aspx?go=Support&pid=752
--Hideo Fujii OriginLab
P.S. just I want to make sure that the graph window of the flipped image is refreshed ("Window: Refresh" menu), though refreshing the window was not necessary in my test.
Just as a record for both piotrmax1 and whom to come by this thread... So far, I haven't been able to reproduce the problem. If any of you have encountered this or a similar problem, please send the Origin project file to the Origin tech support (tech@originlab.com, mentioning this post.