What's wrong with PNG files? Options

[*The Markster*]

I realize that people can still use PNG files because of their high reliability. But aside from the fact that, for an unknown reason, many are neglecting PNG files and looking up to GIF files instead, is there anything technically inconvenient with PNG files? I do know that some browsers experience alpha transparency issues with them, but I've heard that there's some fixes too. But I'm not really sure. xD

So yeah. Could someone please tell me the pros and cons of it, and if they have fixes? Thanks.

[*mipadi*]

PNG is a great format, aside from the fact that PNG file sizes are slightly larger than that of JPEG (due to the fact that PNG is a loss-less compression format). Of course, not all browsers (specifically, IE) have full support for transparent PNGs, so you can't expect everyone to view them properly.

Actually, I expect Scalable Vector Graphics (SVG) to eventually supersede PNG, or at least start to gain popularity, since it's a better file format—but not a lot of browsers have support for SVG yet. (Firefox does, as well as WebKit-based browsers like Safari.)