39710 - frame scrollbar's can be off by some 20 pixels

Status: VERIFIED DUPLICATE of bug 30548

(Core :: XUL, defect, P4)

Description

[Jeremy M. Dolan]

I don't really know how to explain this, so just do it yourself and you'll see 
what i mean.

1) Load testcase (i used 2000051708 win98)
2) Wait for both frames to fully load
3) Now you have www.netscape.com loaded in the left frame. Use the horizontal 
scrollbar to scroll all the way over to the left.
4) Now, start enlarging the frame. Near the end, the scrollbar will think the 
page is all in view and disable itself, but there are still 20 or so pixels 
that are to the left... if you resize the fame smaller, and scroll back with 
the scrollbar, you'll notice them. It usually will jump about half of them 
itself, as soon as the scrollbar pops up again.

Comment 1

[Jeremy M. Dolan]

Attachment: test case

Comment 2

[Jeremy M. Dolan]

interestingly, vertically mozilla handles this perfect. even does a smooth 
reflow after the scrollbar goes away.

Comment 3

[John Morrison]

Did you mean (in 3 above) scroll all the way over to the _right_? If so, yes,
I see what you mean. I think this is a variant of bug 30548.

Comment 4

[Peter Trudelle]

well, since you didn't resolve as a dup, reassigning to evaughan as p4 for m18

Comment 5

[Eric Vaughan]

The scary thing about this bug it I can not reproduce it in a debug build. But I  
often hear it exists in a optimized build. That makes it very difficult to fix.

Comment 6

[Peter Trudelle]

mass-moving all bugs to m21 that are not dofood+, or nsbeta2+

Comment 7

[djk]

This may indeed be a varient of bug 30548.  (I made a comment on that one, too)

I can repo this bug (or a similar one) on Win98, 2000063020(?) nightly.
Just open the sidebar, click on bookmark tab, open enough folders to get a 
scrollbar, then scroll to the bottom of the list.  Sometimes, the scrollbar 
can't go down far enough to see the bottom of the list.  I haven't been able to 
repo this consistantly; I'll continue to try.

Comment 8

[John Morrison]

Resolving as duplicate of bug 30548. 

(Side note: the comments by djk about the bookmark scrolling aren't in fact
related ... that is a tree, while this bug and bug 30548 are concerned with 
scrolling of HTML content -- completely different layout rules.)

*** This bug has been marked as a duplicate of 30548 ***

Comment 9

[Scott Brodmerkle]

Verified dupe.