Waiting is a good idea because I don't think 1-2 days this early in the application cycle will make any difference. Just FYI, here's the text of the response I received when I contacted tech support:
Thank you for your message.
Please remember that the PDF preview is an unofficial document and usually not used by the institution. They will pull all of your answers directly from the application, into their databases. You can feel confident that your information will reach them correctly as long as the answers in the online form have been completed.
If your online form is due shortly, you may want to check the pages of your form carefully before you submit it to ensure that your answers were saved properly.
We apologize for any inconvenience this is causing you. Let us know if we can help further.
Regards,
Hobsons Technical Support
Ticket Information:
Ticket #: 10234678
Date Created: 7/03/2012 03:34 PM EDT
Summary: JHU med app question 20
Details: My response to question 20 on the JHU medical school application does not appear in the pdf generated before I submit my application. However, when I reload the page with that question ("Other Experiences and Interests"), my text is present in the response box. I have tried saving my application, logging out and logging back in, and "save and continue"ing my application, but none of these solutions will make my response to question 20 appear in the pdf.