When using the Toolbar and Overlay module in Google Chrome, scrolling down and back up on the overlay page results in these ugly things being drawn over the page:

http://stuff.ermarian.net/arancaytar/images/screenshots/drupal/bad-redra...

Clicking on the toolbar removes these bars again.

I'll try to reproduce this in other browsers later; this might be a Webkit rendering bug.

CommentFileSizeAuthor
#2 7669340-chrome-overlay.png271.49 KBsivaji_ganesh_jojodae

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aspilicious’s picture

aspilicious commented

Is this the first time you see this? Never saw this before o_O

sivaji_ganesh_jojodae’s picture

sivaji_ganesh_jojodae commented
Component: toolbar.module » overlay.module
Priority: Normal » Minor
StatusFileSize
new 7669340-chrome-overlay.png271.49 KB

I can reproduce this very badly in chrome 5.0 dev release. It works fine in beta.

Only local images are allowed.

damien tournoud’s picture

damien tournoud commented
Status: Active » Postponed

This is because of a regression introduced by a performance improvement patch in Webkit recently.

Faulty patch: https://bugs.webkit.org/show_bug.cgi?id=33150
Fix: https://bugs.webkit.org/show_bug.cgi?id=36652

As far as I know, there is nothing we can do, we are not doing anything wrong and we not the only affected system.

damien tournoud’s picture

damien tournoud commented
Component: overlay.module » toolbar.module
Priority: Minor » Normal

The issue is directly created by the fixed positioning of the toolbar.

damien tournoud’s picture

damien tournoud commented
Title: Scrolling up draws horizontal bars over the page » Issues with position:fixed elements in Webkit

So, the refresh bug was fixed just before Chrome 5 was released, but recent nightlies seems to exhibit a slightly different bug. It seems that the quest of Webkit to optimize the refresh of pages with position:fixed elements is not complete yet :(

Status: Postponed » Closed (outdated)

Automatically closed because Drupal 7 security and bugfix support has ended as of 5 January 2025. If the issue verifiably applies to later versions, please reopen with details and update the version.