I have used gimp but...

[Ekalavya]

Yea I have made some avatars using gimp but when ever I upload them especially 150X300 avatars
they become kinda dull less in quality . I am sure i have used quality stock is there something I there something
i missing when I make them :dunno:

 

[Kushina Chan]

May be server graphic Quality is getting dull.

 

[Chihaya]

hmm........
could be something with the zooming, or something.
I've had problems like that with photoshop, which is kinda like Gimp