May Jeff,
Wow.... So now that I have spent yesterday looking into this issue with all the wrong info, you decide to provide all the info that I really needed... What does this issue even have to do with the forum thread "eSearch URL search & print widget error"? Beside having the words eSearch and print in the title the issues in that thread have little to nothing to do with your issue.
Now that I have the real info on your issue I will try and find some time to look into it.
Have you also secured your print service? ESRI has a couple of bugs logged for the print widget not using a proxyURL and one for print widget not providing the ability to use a token on the secured print service.