Comment 1 for bug 1190207

As I see on your image it is working fine. Maybe you have lowered Quality too much. For start leave the Quality at 5.

If you still think this is a bug, can you please install the latest Pinta development from:
https://groups.google.com/forum/?hl=en&fromgroups=#!topic/pinta/jIDZUvbum-g
and retest.

Can you please also describe what is the result you are expecting? Can you provide some details with other image program like Gimp for example? Please write step-by-step instructions.