I think you should move the eye down, since it looks like she has no forehead.

xxx

You should use a different applet than PaintBBS. I would suggest Lascaux Sketch, but some people find Shi Painter better, since it's from the makers of PaintBBS. You should use layers to put the lineart in one layer, coloring in another, and in the third layer the background. That pretty much eliminates the need for the fill tool, and ultimately those pesky white spots. :3

PaintBBS is pretty simple to use, and can produce some pretty nifty graphics (See; Everdream), but better starting applets would be Shi-painter, or Shi-painter Pro. Lascaux is another excellent applet, but may be more confusing at first.
Other than layering problems, you may want to work on proportions and symmetry a little more. The arms are different lengths, and one ear is much larger than the other. The head seems very big, but it could just be the style. The neck also dominates the shoulders a little too much, in fact, the neck is almost as thick as the torso. That could be considered a problem.

Don't worry though, you'll soon get the hang of things, try observing realistic proportions (IE, not Anime) to get a better feel of human anatomy. In a.. non-dirty sense.

What I did to get the hang of proportion was to see how others drew it, or look at myself in the mirror and draw what I saw.

=O ooooo~ that fish ish prettyish~

go to the dock (where cap'n will pick you up) when its raining and try fishing there

what dock? ;D;