I'm former Chromium-browser user, but after not upgrading the PPA for 2 months, I switched to Google Chrome browser yesterday. Everything is okay, except some strange behavior on some pages and crashing after loading "chrome://" configuration pages. The best known website with strange behavior is youtube, there is a picture what I see: When I open user menu in top right corner, it crashes that way and even after closing the menu, some parts of menu stay display.

You may say it's Youtube problem, no, I have this problem at least on three other websites, here it is on Imgur: The problem isn't for the whole side, sometimes it happens from the middle of the screen.

The interesting part is that it happens everytime in the same distance from the right border. When I check the DOM elements with the Developer tool, the overlay which shows element's position is rendered how it should be. What is more, if there is anchor after the crashed area, it works after clicking on it. Selecting text in crashed page is impossible.

I hope there is enough information to give me an advice, thanks in advance. :)

EDIT:

Here is what the browser posted in "chrome://gpu-internals/":

Graphics Feature Status
Canvas: Software only, hardware acceleration unavailable
Compositing: Hardware accelerated
3D CSS: Hardware accelerated
CSS Animation: Software animated.
WebGL: Hardware accelerated
WebGL multisampling: Hardware accelerated
Problems Detected
Accelerated CSS animation has been disabled at the command line.
Accelerated 2d canvas is unstable in Linux at the moment.

Ubuntu 12.04 | Gnome-shell 3.4.1 | ATI Radeon 4550 | Screen resolution 1024*768 | Chrome version 20.0.1132.57 (Official Build 145807)