31618 - Selection of elementes from Program: box causes scrollbars to dance

Status: VERIFIED DUPLICATE of bug 30091

(Core :: Layout: Form Controls, defect, P3)

Description

[Clay Collier]

This is certainly the most visually striking bug I've seen so far.

System: Win 98

Steps to Reproduce:
1)Load <a
href="http://bugzilla.mozilla.org/query.cgi">bugzilla.mozilla.org/query.cgi</a>
2)Scroll down to the selection boxes near the bottom of the page
3)Select an element from the Program: box

Results:
Scrollbar from the components select box begins to "vibrate" in place, jumping
around the screen and leaving images of itself.  The location indicator on the
scrollbar fills gradually.  Eventually, this odd display stops, resulting in the
select boxes being shifted to the left of the page

Expected result: simple selection of an element in the box

Affected Builds:
M14 (build ID 2000022820)
reproduced on a clean install

See also:
<a href="http://bugzilla.mozilla.org/show_bug?id=19608">bug 19608</a>

Comment 1

[Gervase Markham [:gerv]]

Funky :-) 
                                                                                            
[e-mail] - are you still seeing this problem on recent builds of 
Mozilla?

Gerv

Comment 2

[[e-mail]]

The Program box has JavaScript on its onChange event to repopulate the Component
list which is then being continually repainted. Perhaps its painting (and the
document reflow) should be deferred until after the event has been processed?

Comment 3

[rods (gone)]

*** This bug has been marked as a duplicate of 30091 ***

Comment 4

[Matt Perry]

Verified duplicate.