Using Reader, are you able to view a pdf portfolio through a browser, fill in form fields on one file within the portfolio, select different file within the portfolio, then come back to the first file and have the form fields retain their data? I am able to do this currently with Acrobat 9 and IE 8 / Firefox 3.6, but have encountered other users who have the data erased when switching between portfolio files. Is this a browser caching issue? Is it an Acrobat vs. Reader issue? Also, I have "extended features in Adobe Reader" for each file in the portfolio when they were created. Any help would be much appreciated.