Strange huh? Traffic of my site http://ipadquote.com has been dropped in the last 3 days. I've lost 90% of traffic. On these days my site PR was improved from 2 to 3. My site is still indexed by google. What's the hell is this?
I think ranking drop was not a problem.There was any other problem like slow of season ect. OR any particular day traffic a can be down because up- down daily.
PR update is not an issue, i think your site has lost traffic due to lost SERPs, check for your main keywords if you still hold the ranks?