I just contacted Symantec about this issue.
I asked many questions, but in the end the most I could get out of them is this link. It is a form you need to fill out, to have your site re-evaluated....
http://us.norton.com/support/kb/web_...070815 2454EN
So to sum up, once you are flagged, your site pops up warnings to your surfers. Once you fix the problem, your site remains flagged by Norton Security until you set up a Norton account, and request a flag removal.
How about that?