A Fieldset Alternative
Fiedsets are an easy way to add some separation between content and clearly define areas within a webpage. However, if you wish to add a background to them it can be rather problematic with Internet Explorer. The background appears to spill above the fieldset to the top of the legend.
To see what I mean take a look at the screen shot below of a fieldset on IE6.
There are a couple of ways that you can address the problem.