This is not the usual Popularity Contest error. I have got it installed and working correctly (sort of). The issue is in a WPMU blog that I run.
The popularity contest is used to display the most popular posts for the month and all time on this page here: http://craftgossip.com. You will notice that the links in the list are all wrong. Even though the titles are correct, they all point to the same post. They point to the last blog post entry on the left hand side of the popularity contest.
This is where it gets weird. It happens only on the main page. On all other pages, including other blogs on this network, it works fine. For example. try, http://sewing.craftgossip.com. All the links here are correct.
It gets weirder. Even on the main blog, the links on internal pages are correct. For example: http://craftgossip.com/contact-us/. The links in the popularity contest tabs are correct links.
I hope someone can help me in resolving this, as I am tearing my hair out for the last 2 weeks over this!