GIF Support Returns to GD
g_adams27 writes "Legions of geeks and developers owe a debt of gratitude to Tom Boutell and his "gd" library, which powers the drawing and graphic-generating tools used by dozens of open-source projects. And now, with the expiration of the last Unisys patent on the GIF format, support for GIFs has finally been reinserted in gd. The GIF/PNG/MNG wars may continue, but having more options is good!"
Not complete lack of support, but IE's PNG support is partly broken. Mostly in that it doesn't support alpha transparency, though all other major browsers do. And that's a real shame because it's a very nice feature. This alone would give PNG a clear advantage over GIF if it wasn't for the fact that the only major browser that doesn't support it happens to account for over 90% of the user base.