Chrome toolbar icons acting weirdly It recently started happening that the icons in Google Chrome started freaking out, and randomly look weird:



And they don't always look the same, either:



The appearance of them tends to change if I hover over them, do any tab-related actions, disconnect or connect my external monitor, etc.

The download circle progress bar and icon also exhibit this behavior.
I assume you are using the dev version of Chrome (19.0.1077.3). If so, this is a bug that was introduced a few days ago. Expect it to be fixed with the new update. Here's the bug report on the official Google blog: Dev Channel Update.

Edit: I just checked for updates manually, and indeed the update was available, solving the rendering issue. To get the update now, got to Chrome settings (chrome://chrome/settings/), and click on the Help tab. The app will check for updates automatically, and ask you to relaunch the browser.