I've been using PSP8 for some time now and generally have no particular problems with it, except one. PNG alpha-channel transparency seems to be lost whenever I open a file previously saved with alpha-channel trans. This image of the PNG Optimizer will help explain my problem:
When I save an image using the above settings, it appears to save with proper alpha-channel trans as when I then import it in SKS5, the converted .tga displays proper trans in the skin. However, if I re-open the .png file, often the trans is lost & the image displays white where the trans should be as in the left panel above. If I then just close it or save it, the .png alpha-channel trans is lost - if I re-import it, the converted .tga has no trans. This is not consistent but happens more often than not; only occasionally will a .png with alpha-trans open in PSP8 with transparency properly displayed as in the panel on the right above.
I have the option selected to "Load and save transparency from / to alpha channel" in PNG File Format Preferences.
Any ideas why the trans isn't sticking?