I have a wierd problem with netscape 9.x. In some page, the overflow give some extraspace after the footer like this one http://jangkang.org/archives/436. while some other page are rendered perfectly, although they are using the same overflow method.
The layout only fails with netscape 9.x. Even ie6 and netscape 8.x or opera 8.x can render all the page with the "overflow" part perfectly.
Netscape is a dead browser, Mozilla stopped supporting it a year ago. Users should switch to Mozilla, Firefox or Seamonkey, etc. Having said that, since I not longer have Netscape myself, cannot see the problem.