292470 - Using :hover with overflow: auto produces flashing display

Status: RESOLVED WORKSFORME

(Core :: Layout: Block and Inline, defect)

Description

[Rune B. Broberg]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.7) Gecko/20050414 Sunrabbit/1.0.3 (Firefox/1.0.3 polymorph)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.7) Gecko/20050414 Sunrabbit/1.0.3 (Firefox/1.0.3 polymorph)

http://www.daimi.au.dk/~mihtjel/blink.html presents a page with a list and some
text, the text in a div with overflow: auto set. The list changes list-style
when the cursor hovers using li:hover. Both things are in a float: left div.

Letting the cursor run over the list produces a blinking of the text of the div
'b' above the list. A more obvious example is: 
http://www.daimi.au.dk/~mihtjel/test_overflow.html

All three elements of the style in the first example are required for the
problem to occur, as shown by:

http://www.daimi.au.dk/~mihtjel/noblink1.html
http://www.daimi.au.dk/~mihtjel/noblink1.html
http://www.daimi.au.dk/~mihtjel/noblink3.html

Reproducible: Always

Steps to Reproduce:
http://www.daimi.au.dk/~mihtjel/blink.html

Major components are:
A list with changing list-style by li:hover
A div with text and overflow: auto set
The above in a floating div.

Actual Results:  
Passing the cursor over the list produces a blinking of the contents of the div
with overflow:auto set.

Comment 1

[Rune B. Broberg]

Attachment: Example of the problem occuring

Comment 2

[Rune B. Broberg]

Attachment: Removing the li:hover-part eliminates the flashing

Comment 3

[Rune B. Broberg]

Attachment: Removing the float:left-part eliminates the flashing

Comment 4

[Rune B. Broberg]

Attachment: Removing the overflow:auto-part eliminates the flashing

Comment 5

[dolphinling]

Weird. Kinda looks like it's reflowing every time list-style-type changes...

Comment 6

[Bernd]

do you see this with a recent nightly (after april 29th)?

Comment 7

[dolphinling]

Looks fixed :)

It was broken in the April 20 build I had earlier, fixed in April 30.

Comment 8

[Steve England [:stevee]]

WFM Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8b2) Gecko/20050430
Firefox/1.0+
Resolving WFM as per comment 7 and this comment; although I suspect bug 240276
fixed it, I can't be sure.