I write this rant because I've developed a true hatred for Microsoft's web browser, "Internet Explorer". It sucks. The flaw in it that drove me to complain this way is in how it handles "button" tags in forms. They are very useful tags that can make the presentation of a form very simple and dynamic. Unfortunately, IE does not handle them properly, and I learned this after writing about 2000 lines of code while testing it with Mozilla FireFox, a far superior browser that I strongly recommend to everyone. My scripts worked quite nicely with FireFox, but IE choked on the "button" tags and, because the majority of the web population uses it, I was forced to rewrite my page to work with it.
Some other pain-in-the-ass problems with IE that really get my goat:
Of course, there is also the usual list of problems such as a mediocre user interface, security holes, and lack of standard compliance.