A MARQUEE whose height is specified using the HEIGHT attribute (rather than as a CSS property) ends up having a different height (that seems to depend on the height of its contents). In the attached testcase, the expected result is two marquees 100px tall and a green rect 100px tall. The actual result is that the yellow marquee's height is almost 400px instead.
Created attachment 2900 [details] Testcase
Confirming this issue with a fresh pull of TOT Webkit (07/10). This problem doesn't occur in Safari 2.0 (412) and Mac Firefox 1.0.4.
I checked in a fix for this problem. I added a small section to updateMarqueeStyle() in render_layer.cpp that address this problem and the original problem that caused this regression. Vertical marquees without a specified height attribute will now default to 200px.
Thanks, Beth!