Any idea why Chrome is now a little Android?

Hey all, a couple of days ago, the icon for Chrome on my phone changed mysteriously to a little green Android. Still works fine, but no more Chrome logo, and it's a bit odd... any ideas on how to change it back, and or why it happened? I hadn't really been doing anything weird with it before it happened, though I did remove and reinsert the SD card and restart shortly before.

It's Android 4.0.4 on a Motorola Atrix HD.