The Problem:
Note: This only applies to XHTML 1.0 Strict Doctypes and Mozilla.
I make this type of layout all the time!  Two fixed width columns on either side of a fluid column.  Recently I had to put a list of article teasers into the center (fluid) column.  No problem, I marked up an unordered list, floated [...]

clearfix, CSS, FF, FireFox, HTML, UL, Unordered List Hide

The Problem:
I recently built a form for a customer which had a really long legend!  My content area was floated to allow for a right hand sidebar and I noticed that with the addition of the new legend the layout had broken.
The issue, it turns out, is that both IE and FF handled the legend [...]

CSS, Error, FF, Fieldset, FireFox, HTML, IE, Internet Explorer, Issue, Legend Hide

Demonstration of a CSS issue in IE regarding CSS hover menus and a way to fix it.

CSS, HTML, IE, Internet Explorer Hide