After running the upgrade, I tried running the tests a few times. The request seems to end, and the tab is blank. I can re-click the tab, but it still tells me that last check was run over a month ago.
The server log says, "PHP Fatal error: Maximum execution time of 30 seconds exceeded in /path/to/plugins/ultimate-security-checker/securitycheck.class.php on line 918.
I'm running a multisite install, the previous version worked fine.