I installed this on my self-hosted blog several hours ago. It's picking up views, referrers, and outgoing links fine, but in the Top Posts list, only today's posts actually contain a title or a permalink. All other posts (including those that are still on the front page) are listed only by post ID number, and link to the main blog URL (with an extra /, suggesting that it's inserting a null string in where the path would be).
How does the stats server retrieve the title and permalink? Does it access the post pages? The feed? Is there an IP I should whitelist? Should I just wait a day and see if it sorts itself out?
More at my post on the issue.