When a table that is created with css is placed within a cell in an normal html and javascript modifies rows within the table created using css the resulting html is not rendered properly. The css rows are pushed down by a number that is relative to the number of elements in the row. I have an example to illustrate the problem.

Maybe http://validator.w3.org/check?uri=http%3A//nicole.lightsp.com/ff_bug.html may help you correct the errors ? And check JSconsole too

Document now validates xhtml 1.0 compliant. Problem is still exists. No Javascript errors occur on the page.

Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8b) Gecko/20050201 Firefox/1.0+ Yeah, seeing the same here. Did you try changing CSS to get it right, I think I've read an article somewhere about display:table issues with Mozilla. See if any of these: https://bugzilla.mozilla.org/buglist.cgi?query_format=advanced&short_desc_type=allwordssubstr&short_desc=display%3Atable&product=Core&product=Mozilla+Application+Suite&bug_status=UNCONFIRMED&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&bug_status=RESOLVED&resolution=---&chfieldto=Now fit ?

None of the bugs listed at https://bugzilla.mozilla.org/buglist.cgi? query_format=advanced&short_desc_type=allwordssubstr&short_desc=display%3Atable&product=Core &product=Mozilla+Application+Suite&bug_status=UNCONFIRMED&bug_status=NEW&bug_status=ASSI GNED&bug_status=REOPENED&bug_status=RESOLVED&resolution=---&chfieldto=Now match the problem I am having. My problem only occurs when the element is changed multiple times with javascript. The first time the javascript is executed the result is fine but subsequent executions result in the rows being pushed down. It looks like the margin or padding width is not being removed even though the rows were removed. I worked around the problem by always writing tables in css and not using the html table tags.

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b4) Gecko/20050906 Firefox/1.4 ID:2005090616 This behavior persists in the above nightly. Confirming and moving to Core/Table: Layout.

Fixed by checkin for bug 162063. Added test.