When I try and change the date in the SelectQASamples.php script, as soon as I click on the date it gives me an error of "Unknown Date Format". It also does it in HistoricalTestResults.php. I have tried to compare the script to other scripts that use the date and have not been able to see what the problem is. I can still enter the date manually, (after closing the dialog box a few times) and it seems to accept the date.
The fix to those two files (and one other) committed to SVN.
If you do not have any local, customized changes to those files, you can get the updated file copies from the link and overwrite the files in your installation.