Normal behaviour. Nevertheless quiet annoying. AFAIK this happens due to a library problem, opera doesnt use the libpng to show the images but some other lib from the sharp rom (which also serves some other needs of different programs).
I suggest you try Opera 7.30 (take a look into the downloads here at ZUG), solved all my problems (on OZ 3.3.5 though, but as far as I understand that shouldnt be a problem)
Regards,
Gina
