IE6 CSS .content rule too broad, can potentially cause issues.

We moved our user login up to a float in the header, and the following rule caused it to break the header layout in IE6:

* html .content {
height: 1%;
}

the "content" class appears everywhere, so this seems like a pretty broad rule to put in the stylesheet -- we're not sure what it's doing (we've heavily modified the up down display), so i can't speak to what else should be in its place.