Sudden Work Stoppage Rated 2 out of 5 stars

Starting yesterday, Update Scanner (v3.1.8 on FF 9.0.1) stopped displaying any pages. It still scans the sites and records the difference, but whenever I click a link, a blank page appears for every site. Happens both in Windows XP and Windows 7.

Anyone else experiencing this problem? Anyone know the fix? What has for years been one of my two or three most valuable add-ons has suddenly become useless.

I installed 3.1.8 in August and updated to FF 9.0.1 on 22 Dec; everything has worked fine since then until yesterday, so it was not any recent update action on my part. I'm adrift at sea!

This review is for a previous version of the add-on (