Alpha PNGs in Internet Explorer 6
That elephant in the room is losing some weight. The forever scorned IE6 has always had issues with alpha PNGs, those semi-transparent images of goodness. The market share of IE6 is surprisingly big, especially for more mainstream sites and web developers such as you and me are still left holding the bag to support them.
Stoyan Stefanov, one of the people behind Smush.it, has posted the fifth installment of image optimization on the the YUIblog. This time on AlphaImageLoader. Stoyan discusses the performance issues involved in using the IE-only filter with some really interesting information. It's definitely worth a read.
Drew Diller, of whom took my VML rounded corners to the next level with DD_roundies, is back with another script, specifically aimed to fix the alpha PNG issue. After noticing that the VML supported alpha PNGs, Drew took on the task of isolating the functionality and to ensure that background-position and background-repeat were properly supported as well. Check out DD_belatedPNG for more info and lots of examples.