There have been a lot of recent changes with Chrome. The most notable being the new logo. Google explained that it wanted to simplify the logo, since the whole browser but the logo was simple. Some love it, some hate it.
Don't freak out if you don't see your icon change, this is for Chrome 11 and up. Another change is the New Tab page. Many think this for when Chrome OS arrives on tablets. Looks pretty cool; looks pretty Jolicloudy.