Backlinks bug ?

The number of backlinks on my posts are behaving strangely. A new bug to be solved?

Scroll down to my post called "Working around the 1 comments-bug". In the footer you will see "0 backlinks".

Now open the post itself, and scroll to the bottom. You will see: Number of backlinks 1, followed by the link.

That is very strange, because for both counters the tag is used. In the first case it gives 0, in the second case 1.

Any ideas out there what's happening here?