Mine was doing exactly the same thing and this fix has brought up a couple of new issues:

1) On my main page I see that I have a total of 21 links on my site, yet only 20 show in link check. When I choose the 19-21 range there are only two links on the screen. I also went through all of the ranges and counted them. I also tried resetting the range to 25 and counting them. There are 20 showing up in link check, not 21. There are no sites that need to be verified, so that's not the problem.

2) The reciprocal link check only verifies that a web document exists at the URL they entered. It does not in fact verify that there is a reciprocal link, which makes it rather self-defeating.

Any ideas?

Thanks