417452 - iFrames display with artifacts when scrolling over them

Status: RESOLVED FIXED

(Core :: Layout, defect, P2)

Description

[Golyc - André Villar]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9b4pre) Gecko/2008021004 Minefield/3.0b4pre
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9b4pre) Gecko/2008021004 Minefield/3.0b4pre

When loading this page And using a zoom bigger than 0% the google ad has flicker on it, as many times the page reloads the ad frame.

Reproducible: Sometimes

Steps to Reproduce:
1. Zoom the page
2. scrool to ad (you have to get the ad of the chrome and back at it)

Actual Results:  
3. Se horizontal artifact on the ad

Expected Results:  
3. Don't horizontal artifact

Comment 1

[Golyc - André Villar]

Attachment: Exemple of the bug

Here i scrolled via the scroll bar to get more artifacts, you can see that even images get this artifacts, but it rarer for images to show these.

Comment 2

[Golyc - André Villar]

So i'm upping this bug, because it really bothers me :)
Did i mentioned that i observe this on 3 computers?
2 Vista Notebooks and My main PC.

Comment 3

[Damian Shaw [Quan]]

Do you have the direct code that exposes this bug?

I'm struggling to find any example (doesn't appear to be on that URL anymore), but I have come across other code where CSS goes wonky when zooming.

Comment 4

[Golyc - André Villar]

All i can tell is that the bug appears on adsense. Really don't know how you cant reproduce it as i did on 3 computers... :(
At the specific time i took the screenshot it was being hard to the bug show up. so i just opened 10 tabs at macrumors.com at 115% zoom (i think) and started scrolling, eventually i found one.

Plus the artifacts appears to be rarer (hope i spelled right) on vertical images

http://www.glazman.org/weblog/dotclear/index.php?post/2008/02/11/Is-fullZoom-zooming -- just saw it here going to upload image

Comment 5

[Golyc - André Villar]

Attachment: vertical artifacts

Sorry for the bug spam but this is the first time i get this bug scrolling horizontally (vertical artifacts)

Comment 6

[Damian Shaw [Quan]]

I've seen this bug in multiple places, not just Google adsense.

When you zoom in and slowly scroll over particular frames or ads, the background gains artifacts like the author describes.

Not able to reproduce this bug 100% of the time, but was able to previous do it at http://mess.be/ down the inside frame and http://www.glazman.org/weblog/dotclear/index.php?post/2008/02/11/Is-fullZoom-zooming over the google ad.

Running latest Trunk build as of post on XP x64

Comment 7

[Golyc - André Villar]

(In reply to comment #3)
> Do you have the direct code that exposes this bug?
> 
I´m sorry that i forgot to mention. It doesn´t appear to be any css/html bug but an gecko bug.
The case for me saying this is that if i go to another tab or switch applications and go back to the page (i suppose its redraw) there´s no artifacts !!

Comment 8

[Mike Beltzner [:beltzner, not reading bugmail]]

--> Core::Layout

Comment 9

[Damian Shaw [Quan]]

I still can't duplicate this all the time and haven't been able to come up with a simple test case, when I have been able to dublicate it:

* The artifacts always how up in an iframe
* Scrolling around the page is very laggy, the refresh rate of showing the new content is slower
* The faster I'm moving the more spaced the bars are from each other
* I get horizontal bars from moving up and down, vertical bars from moving side to size

Comment 10

[Damian Shaw [Quan]]

Attachment: Example of bug when not zoomed

Just spotted this bug occur with a Google ad when I wasn't zoomed on any level!! Latest trunk build as I post this.

Occurred at the bottom of download squad: http://www.downloadsquad.com/

Been able to just duplicate it 5 times in a row, only difference about previous times is that:

* Not zoomed
* Scrolling wasn't laggy

Comment 11

[Damian Shaw [Quan]]

Attachment: Another artefact found, not Google adsense

Spotted this again, not zoomed and not google this time.

It's an in an iFrame for a digg, see near the bottom left of the screen shot, takes from http://www.engadget.com/

Using latest trunk build as I post this.

Comment 12

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Is it fixed since the fix for bug 408913 landed?

Comment 13

[Damian Shaw [Quan]]

Not been able to reproduce this bug since bug 408913 landed, but I wasn't able to reproduce it 100% of the time anyway. Will keep testing.

Comment 14

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Let's close it based on your report. If you do manage to reproduce it, or Andre manages to, feel free to reopen.