I have a question and a change I made that others might be interested in.
First, I too am worried about my users wondering where the formatting went. And I was worried that they wouldn't read the popup. So I modified the plugin to stay up and then to fade out after the user has hit escape. My method uses the @media to control the visibility of the div on the printout, so it might not be appropriate for everyone.
All I had to do was remove the fadeout/remove statement from the fnFeaturePrint function and put the following line in the fnPrintEnd function.
Finally, I haven't been able to figure out the syntax for specifying the visibility of the conversion buttons. This application only needs the print feature and I don't want to worry about flash issues.
Here is an example of one of the syntax combinations I have tried. Can you point me in the right direction?