Open Bug 648210 Opened 13 years ago Updated 2 years ago

css :hover cuts off during mouse drag across element break at lower z level

Categories

(Firefox :: General, defect)

Product:
Firefox
Component:
General
Platform:
x86_64
Windows 7
Type:
defect

Tracking

()

People

(Reporter: cwbussard, Unassigned)

References

(
URL
)

Details

User-Agent:       Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0) Gecko/20100101 Firefox/4.0
Build Identifier: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0) Gecko/20100101 Firefox/4.0

As best I can tell, css :hover is resetting from true to false when I move the mouse across the edge between two elements that exist at a lower z level. I suspect that some kind of interaction between different positioning types is a factor. A major problem for pure CSS menus. This problem is new to FF4.

Reproducible: Always

Steps to Reproduce:
1.Goto http://www.mubulaw.com/
2.Hover over one of the "practice areas" or "about us" menus.
3.Move the mouse very slowly through the menu options and watch :hover cut out as you cross the edge between the elements beneath the menu. 
Actual Results:  
Menu vanishes abruptly despite hover.

Expected Results:  
Menu does not vanish until mouse is removed from menu.
Good nightly - Mozilla/5.0 (Windows NT 5.1; rv:2.0b9pre) Gecko/20110105
Firefox/4.0b9pre

Bad nightly - Mozilla/5.0 (Windows NT 5.1; rv:2.0b9pre) Gecko/20110106
Firefox/4.0b9pre

Pushlog -
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=d2bd42931b03&tochange=c6e65b6259db

Looks like regression from bug 615794
Status: UNCONFIRMED → NEW
Ever confirmed: true
Looks like Bug 646757
Thank you to Alice and aravindm. Yes, it does look like Bug 646757. I apologize for failing to find that bug via search.
Severity: normal → S3
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