User Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:24.0) Gecko/20130528 Firefox/24.0 (Nightly/Aurora) Build ID: 20130528030942 Steps to reproduce: http://jsfiddle.net/Supuhstar/TxtGn/ Placed an absolutely-positioned DIV within a relatively-positioned TD Actual results: http://jsfiddle.net/Supuhstar/TxtGn/ The absolutely-positioned DIV was positioned relative to the viewport rather than its last positioned parent (the TD) Expected results: http://www.w3.org/TR/css3-positioning/#absolute The absolutely-positioned DIV should have been positioned relative to its last positioned parent (The TD) This bug does not exist when the relatively-positioned parent is not displaying as a table-cell: http://jsfiddle.net/Supuhstar/TxtGn/1/