[Plugin: Disqus Comment System] PHP warnings after upgrading to wp 3.1

Getting this on each post listing in wp-admin, under the comments column:

Warning: number_format() expects parameter 1 to be double, string given in /path/to/wp/wp-includes/functions.php on line 156

If I deactivate disqus, the error goes away. Re-activate and it comes back. I also uninstalled disqus and re-installed, that did not fix it.

I echo’d the arg that’s being passed to number_format() and it is indeed a “number” but I guess it’s typed as a string instead of a double.