Could be jumping the gun here, but is Coinbase down? http://i58.tinypic.com/o5uhbq.png

EDIT: It now reads this: Coinbase is currently offline

No cached version is available.

The most likely causes:

The server is down for maintenance
There may be a network problem
The site may be experiencing excessive load
Retry for a live version of the site

We'll post updates on Twitter if the problem persists