04-09-2012, 03:38 PM
The first one suffers from upscaling, you really should've retraced the lines (vecorts work well for such simple styles, check out inkscape.org). The second one has broken lines (check the upper part). The fourth one should have the text above the image for obvious reasons (and maybe 20-30px lower). Your grey-to-black blurs/gradients also don't work, they aren't smooth at all. Might be due to saving settings, though, I'm not sure about that. Just as some general pointers. 