Thanks for the tip.
Zooming in did make the cleaning up notably easier, so here is...

The fifth WIP. Cleaned up head and stalk, and moved the head up a bit anyways.

Really need to do something about that bottom part now.

Edit: Hmm, removing the black outlines produces an interesting effect...

http://i39.tinypic.com/2ild1y0.png

I'll be keeping the outlines, though.