Color calendar meetings by status

When the status of a meeting changes from ‘planned’ to ‘held’ i plan to automatically create a time sheet entry for use in billing.
As a reminder to help me change the status of a meeting i was color coding the calendar dashlet , as described in this link.

I realize its not upgrade safe, however during the upgrade to 7.3.1 the /modules/Calendar/Cal.js file seems to have changed; and has moved from the function CAL.add_item_to_grid to the function CAL.create_item? This seems to have broken the customization/workaround?
How can i customize the color of a meeting based on its status?

Damn it, sorry. I was still in developer mode after some issues i experienced upgrading. Turning developer mode back on sorted it.