Here is some information straight from NB regarding ePortfolio.  They have added to new FAQ questions to their website based on the questions they are receiving through Customer Service. 

1) Q: Several minutes have passed since I uploaded my files yet the file status still shows as “Processing”, or I’m unable to preview my files. Should I start over?
A: You shouldn’t need to restart the upload process, instead check the following things:

• What internet browser are you using? If you are using a PC, make sure you use Internet Explorer. If you have a Mac, depend on Safari as your browser of choice. Google Chrome and FireFox, while excellent browsers, are not compatible with the ePortfolio system.
• Do you have current versions of Adobe Acrobat Reader and Adobe Flash Player installed? If your set-up does not include this software, you may not be able to preview your files.
• Have you clicked “Refresh”? If the file status continues to show “processing” after several minutes, click the blue “Refresh” button found in the upper left-hand corner of the ePortfolio system.

2) Q: I’ve uploaded my files, but the status on my portfolio entry summary page still shows “In Progress”, what should I do?
A: Your status will remain in progress until you mark each file as “Ready to Submit”. From your summary page, click on “Update” and then click the “Ready to Submit” check box at the top right corner. The status on your summary page will now reflect “Ready to Submit”. If after clicking this check box you discover your file needs to be changed, simply uncheck the box and you’ll be able to replace it

The full list of FAQs can be found on our website at http://www.nbpts.org/faq.