Any hope this will be fixed in a future version?
Just an update in case anyone is interested. I went back to Tableau about this hoping maybe this would be resolved. I think they don't even consider this a bug -- even thought I certainly consider it a least a disappointment. Just to spare anyone the trouble of reaching out to tech support, I'll drop in what I heard back:
Thank you for contacting Tableau Technical Support. I understand exported PDF on Tableau Server is not including the contents of web pages. Please let me know if I misunderstood your request.
It is the expected behavior that exporting views to PDF will not include web page objects. The dashboard containing a web page object has no knowledge of what is in the web browser object so it is left blank.
I believe the above information will resolve this issue. If the information provided does not resolve the issue, please let me know by responding with a few details regarding why the solution above did not resolve the issue.
Please see the following Tableau Server Product Help article for more information: http://onlinehelp.tableausoftware.com/current/server/en-us/help.htm#export.htm