I've just noticed that this thumbnail:
http://81.5.150.113/wiki/images/thumb/180px-Diagram2copy.png
and original:
http://81.5.150.113/wiki/images/Diagram2copy.png
The thumbnail has only about 6% the pixels of the original, but is still 88%
as large. It'd be faster to just have the original.
Mediawiki seems to have a problem with PNG thumbnails - it generates 24bpp
ones even the original image was indexed.
Jim
