r 32x32 and small icons should be 15x9.
(And 33x48 et al or 22x13 in one and a half density; 64x44 et al or 30x18 in
double density.)
</li><li>
Historically, compression has not been available for icons.
</li><li>
The inclusion of the bitmap color table is <b>not</b> recommended as it slows
down system performance. PilRC implements a simple color table matching 
algorithm to match the bitmap's color table to the system palette. 
</li><li>
<tt>TRANSPARENTINDEX</tt> is not compatible with direct color bit-dep