Could I perhaps post a screenshot attachment? Its not all instances in the page, just 2 of several where the canvas is blank. IE7/8/9, Chrome, and Firefox up until 7 had no problems.
It appears blank come to find out because the pixel width of the canvas widget being set isn't wide enough in certain instances. We've also had reports Firefox 8.0 beta is having the same issue.
Correction the Cufon generated tag that wraps the canvas.