28366 - radio buttons are flaky when scrolling

Status: VERIFIED DUPLICATE of bug 25979

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

Description

[Andrew Brobston]

I would be astonished if this is not a duplicate, but I cannot find one...

Reproducible: Always
Using both the M13 and 2000-02-17-15 Win98 builds (not necessarily at the same 
time):
1. Open the browser and the URL (hmm, the bugzilla query page)...
2. Scroll down to the set of options starting with "Run this query."
3. Move the mouse pointer over the box on the vertical scrollbar.
4. Hold the left mouse button and move the scroll box rapidly up and down, 
making sure the radio buttons go on and off the page.
Actual result: Some of the radio buttons vanish at random. Moving the mouse 
pointer over them can bring them back sometimes.
Expected result: The radio buttons should be visible whenever they are supposed 
to be on the screen.

There is another radio button bug (possibly related) which I will submit 
separately.

Comment 1

[karnaze (gone)]

Reassigning to Rod.

Comment 2

[John G. Myers]

This is not reproducable on my 2-CPU 255MB desktop NT box and build 2000021808.

Comment 3

[rods (gone)]

Kevin, canyou take a look at this. It is either a paint event issue or a 
clipping issue. This was marked "UNCONFIRMED"

Comment 4

[Andrew Brobston]

I had not been able to reproduce this bug for some time, even on M13. But, alas,
I downloaded Win98 2000-02-22-08, and this bug still exists. I will attach a
screenshot shortly.

Comment 5

[Andrew Brobston]

Attachment: screenshot of radio button/other form control bug

Comment 6

[Andrew Brobston]

I am beginning to suspect that this bug is caused by a memory problem of some
sort. I seem to have a program (that I cannot seem to track down for sure) that
leaks memory. When there are few resources left for Mozilla, the bug occurs.

This is just a theory at this point -- I am still working on trying to figure
out the exact conflict.

I am marking "new" so that this bug is seen.

Comment 7

[Kevin McCluskey (gone)]

I'm seeing alot of palette problems on WIN98. Don could you look at this bug 
after resolving the palette issues, to see if it still exists. 

reassigning to dcone

Comment 8

[dcone (gone)]

Is this in 8 bit (256 color mode).  I did not see metion of this.

Comment 9

[Kevin McCluskey (gone)]

It is in 256 color mode. (8-bit)

Comment 10

[dcone (gone)]

*** This bug has been marked as a duplicate of 25979 ***

Comment 11

[Matt Perry]

Verified duplicate.