Google Chrome Extension weird rendering

Question

I was playing around with some Chrome Extensions, testing stuff, changing samples, etc, when randomly my Google Chrome started to render popup windows that way:

Why? Can anyone help me, please?

[Update]

I don't know why but everything is normal now and I really didn't do anything to fix it.

Answer 1

Judging by the length of the scrollbar, and with that tab open on HackerNews, I'd say renderer mess-ups come in the area of conceivable scenarios. :P

Anyway. If you're not running Chrome from a dev channel, and you're positive you're with the latest stable version you can do this:

1. Disable all other extensions and enable them back, one-by-one; one of them might have GL-related features that don't play well with your video card drivers
2. Search your extension folder for .dll files, who knows which one might try to do what
3. Run Chrome as Administrator; look out for any other software that you might have installed. They can intercept and reposition windows around the screen but in Administrator mode they might just be inhibited
4. Finally, disable your video card driver from devmgmt.msc (not recommended, just for debugging purposes)