On July 24th I upgraded my cooking site (link) from vBulletin 3.6.8 to 3.7.2. The same day I upgraded vBSEO to the latest 3.2.0 release. I was reveiwing my stats noticed a 75% decrease in unique visitors and page views are down about 60%. Following are links to 2 publicly viewable stats on this site:
Here you can see the public announcement about the upgrade on the same day the traffic started to nose dive:
Upgrade Today (July 24, 2008) - Discuss Cooking Community
I am afraid to make any changes on my other sites after seeing these results. Do you all have any suggestions on what I should do to find out what might have caused this drop in traffic?