I too had this problem but no longer. I don't know what I did but all that I did was this. Used Iron to navigate to the Norton site, opened my account and then opened my online identity vault. Then did an upgrade of my Norton Internet Security. Then closed everything, did a restart and as if by magic my Norton Toolbar is back. It looks slightly different and now has an additional Login Assistant button.
That little button next to the spanner now has "shopping information available" whereas it never had any function before.
I have no idea if it was the norton upgrade, or logging onto my online vault but I don't care. Everything now seems to work just fine. This is so much better than chrome.