Terrible picture quality

[Sneak]

Hi probably a much asked question but i can't seem to find the answer.
When I upload pictures some are beautiful, but there are also some pictures where when i look at them in album list, have a strange effect on them.
When i click on them to view them fullscreen, there are normal again.
Is there someway i can turn this off??

[Nibbler]

Post a link to your gallery. Is this really a pnCPG issue or did you just post this in the wrong place?

[Sneak]

Sorry posted it wrong
It's just normal coppermine with sql server
u can temporaly find it @ http://82.94.216.226/~tact/coppermine/
I heard it had something to do with foto's being resized?

Example: http://82.94.216.226/~tact/coppermine/displayimage.php?album=lastup&cat=0&pos=1, this sucks
Example2: http://82.94.216.226/~tact/coppermine/displayimage.php?pid=819&fullsize=1, this is good

BTW: people don't get scared, it are only toy guns

[Nibbler]

What have you set in config for 'resize method'? Try switching to GD2