My complaint is that you look at one page in Internet Explorer and it looks completely different in Firefox.  As a web designer this is really, really annoying.  For web designers that means you have to at least design for the most popular browsers, so you might have to design once for IE and once for Firefox, how crappy is that.  That’s the minimum you have to do as a designer how about the older browsers, your pages could really look messed up.  I know the W3C is working towards a standard and browsers hopefully will abide by them, but who knows when this will all come together.  I have to do more work because this crap, that’s why I’m filing a complaint.