Over at Cozi, we've started a new technical blog. I just put my first post up, describing a nasty problem we had late last year.

Here's the summary:

Internet Explorer 6 does not support transparency in PNG images. The best-known solution is to use the DirectX AlphaImageLoader CSS filter. It's less well known that using AlphaImageLoader sometimes leads to a deadlock in IE6. There are two workarounds. Either wait until after the image has been downloaded to apply the filter to the image's style, or use the little-known transparent PNG8 format instead of the filter.

More here.