1. Choose Preferences
2. Choose the About tab
3. Under the list of contacts, click on the twitter link

Expect: Browser will open at the twitter web page
Actual: Error: Oops! Google Chrome could not find twitter.

The link it's trying to find is:

http://twitter/doitim

But it should be trying to find:

http://twitter.com/doitim

Fortunately, that should be easy to fix!