Hi, Thanks for the color.
May I suggest to increase the strip size ?
in B&W size was 600 x 202 px. Now it is 560 x 174. Sometimes it is difficult to understand the joke (for instance the 'stink eye' in May 21st strip).
If you reduced size to spare bandwidth due to color introduction, then I suggest you switch from gif to png.
For instance for May 23rd strip:
"size in bytes" "strip name" "format info"
39861 2920.strip.print.gif GIF image data, version 89a, 560 x 174
34438 2920.strip.print.png PNG image data, 560 x 174, 8-bit colormap, non-interlaced
27679 dilbert2006112680423.gif GIF image data, version 89a, 600 x 202
png was created from 2920.gif using gimp.
According http://www.libpng.org/pub/png/pngapbr.html compatibility of png is good.
Remark: I don't have adobe flash, thus I get pictures. Its fine!