> My question is: is this a bug in Firefox, or in my incorrect > understanding of the css positioning?
Hello Bill, I can't really answer your question, but it seems that width: 100%; height: 100%; within the .popup div {} declaration caused the movement. Furthermore, I seems that the <div> within the <td> is essential because otherwise there is no real element to which the <ul> can refer to as position. Here's my version: HTH Niklas <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>test menue</title> <meta http-equiv="content-Type" content="text/html; charset=iso-8859-1" /> <style type="text/css"> body, ul, li { list-style: none; margin: 0; padding: 0; } .bannerNav { width: 100%; padding: 0; margin: 0; } .bannerNav td { border: 1px solid #76777A; } .popup div { position: relative; } .bannerNav a { display: block; width: 100%; padding: .5em 0; text-align: center; text-decoration: none; } .bannerNav .popup ul { width: 20em; position: absolute; margin-top: 2px; left: -3000px; /* off screen */ border-left: 1px solid green; border-right: 1px solid green; border-bottom: 1px solid green; background: #FFFFFF; /* has to be set otherwise IE 7 beta 2 closes popup */ } .bannerNav .popup:hover ul { left: 1.5em; /* back on screen */ } .bannerNav ul a { padding: .1em 0 .1em .6em; text-align: left; text-decoration: none; } a:hover { text-decoration: underline; color: red; } </style> </head> <body> <!-- works on Windows with: Firefox V1.0.6 IE 7 beta 2 Opera V8.54 Mozilla V1.7.1 Netscape V7.1 doesn't work on Windows with: IE 6 Opera V7.23 --> <table class="bannerNav"> <tbody> <tr> <td class="popup"> <a href="#">link text</a> <div> <ul> <li><a href="#">a List item 1</a></li> <li><a href="#">a List item 2</a></li> <li><a href="#">a List item 3</a></li> <li><a href="#">a List item 4</a></li> <li><a href="#">a List item 5</a></li> </ul> </div> </td> <td class="popup"> <a href="#">more link text</a> <div> <ul> <li><a href="#">b List item 1</a></li> <li><a href="#">b List item 2</a></li> <li><a href="#">b List item 3</a></li> <li><a href="#">b List item 4</a></li> <li><a href="#">b List item 5</a></li> </ul> </div> </td> <td class="popup"> <a href="#">link text</a> <div> <ul> <li><a href="#">c List item 1</a></li> <li><a href="#">c List item 2</a></li> <li><a href="#">c List item 3</a></li> <li><a href="#">c List item 4</a></li> <li><a href="#">c List item 5</a></li> </ul> </div> </td> <td class="popup"> <a href="#">more link text</a> <div> <ul> <li><a href="#">d List item 1</a></li> <li><a href="#">d List item 2</a></li> <li><a href="#">d List item 3</a></li> <li><a href="#">d List item 4</a></li> <li><a href="#">d List item 5</a></li> </ul> </div> </td> <td class="popup"> <a href="#">link text</a> <div> <ul> <li><a href="#">e List item 1</a></li> <li><a href="#">e List item 2</a></li> <li><a href="#">e List item 3</a></li> <li><a href="#">e List item 4</a></li> <li><a href="#">e List item 5</a></li> </ul> </div> </td> </tr> </tbody> </table> </body> </html> ______________________________________________________________________ css-discuss [EMAIL PROTECTED] http://www.css-discuss.org/mailman/listinfo/css-d IE7b2 testing hub -- http://css-discuss.incutio.com/?page=IE7 List wiki/FAQ -- http://css-discuss.incutio.com/ Supported by evolt.org -- http://www.evolt.org/help_support_evolt/