If you are using Tableau 8 I would like to suggest you to start the Performance Recorder before publishing the dashboards and then once it get published just stop the Performance Recorder which would be generating a report in another tableau window by which we can atleast move ahead to troubleshoot the issue.
If you are using Tableau 7 please try to check if you are still facing the same issue while publishing the individual dashboards instead of all at a time.
I am facing the same issue.
Were you able to resolve this issue?
Can you please suggest where we should look in order to resolve it.