I'm not sure it's related, but I noticed this on twitter:

> .@salesforce users please update your Google Chrome to 31.0.1650.57. This fixes the display issue. [Nate Lipke][1]

I think this comes back to the known issue: [Unexpected display issue after updating to Google Chrome 31 with embedded Visualforce Pages][2]


  [1]: https://twitter.com/EvilN8/status/401094590758780928
  [2]: https://success.salesforce.com/issues_view?id=a1p30000000T1LRAA0