dunno
I use it all the time for moving stuff between photoshop and flash. high colour AND transparency. It's a lovely format.
( rob You should follow me http://twitter.com/robmanuel, Fri 28 Jun 2002, 12:35, archived)

too right .png is the only format
you should really use for flash... never chuck jpgs in.. that just helps to bload out the flash .swf file - i learnt this the hard way
( hal9000 wants Modo 401 but will make do with zbrush 3.1.2, Fri 28 Jun 2002, 12:43, archived)