Paul,

Xara won't use GIF so all the time and effort that you save will be expended changing all the graphics round.

John, (Covoxer) said that the Xara PNG files are 32bpp and that we should request 8bpp but not GIF.

I personally don't understand why a website creation tool wouldn't use the smallest file size generator. I don't think we'll see any appreciable difference from 32bpp to 8bpp when we are only viewing at 96dpi, and the speed difference (and file sizes) will be noticable.