User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.3b) Gecko/20030213 Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.3b) Gecko/20030213 http://www.bouncingchairs.net/testmzbug2.html showcases this problem: A div with two images (one hidden) and an image map with multiple areas is shown. In Mozilla 1.3a, this page works flawlessly (i.e., the events fire when moving *within* the image map, as area boundaries are crossed). In Mozilla 1.3b and the Feb 13th nightly build, it is broken. The events appear to only fire when moving into or out of the *entire map*, instead of in or out of each area, as it should be. Reproducible: Always Steps to Reproduce: 1. Browse to http://www.bouncingchairs.net/testmzbug2.html 2. Move your mouse over the image (it's a single image) without leaving it. 3. No move the mouse into and out of the image area. Actual Results: In Mozilla 1.3b and later (up to current nightly build) only one of the buttons turns black no matter where the mouse is located. It stays that way until the mouse moves completely off of the image. Expected Results: In Mozilla 1.3a the behavior is correct. When moving the mouse over the image, each button is highlighted when the mouse is over it. The events are supposed to be tied to areas of an image map, not to the entire image.

jkeiser, this is yours. I seem to recall another UNCO bug on this too... in any case, your text node changes broke events on <map> elements.

As it turns out, bug 185889 fixes another image map mouseout/mouseover problem, so it probably fixes this too.

This is a dup of bug 110072, and is fixed by the fix for bug 185889, which fixed that bug. *** This bug has been marked as a duplicate of 110072 ***