The WD upload of testtags.php now contains clientraw.txt .. that's where the odd look to your site occurs.
Replace the c:\weatherd\webfiles testtags.txt template from the WD-plugin.zip distribution. If that doesn't solve the issue, you'll likely have to send Brian your WD settings files for resolution.
It seems that WD is confused about the template to be used for testtags.php or has some FTP confusion between the realtime clientraw upload overwritting the testtags.php with a clientraw.txt file.