Issue with Scheduled Task after Hotfix APSB13-27?

We have a scheduled task that runs every 15 minutes and looks in the 'ColdFusion9\Mail\Undelivr' folder for any undelivered emails. If it finds any it moves them to the 'Spool' folder. It has been running fine for almost a year. Last week we applied Hotfix APSB13-27 and the next day we started seeing emails in the 'Undelivr' folder for hours. I manually ran the task that moves the emails to the 'Spool' folder, and the email was then sent fine. That makes me think the Scheduled Task is not running as we think.

Is there anyone who has heard anything about the Hotfix APSB13-27 causing problems with Scheduled Tasks?

We are running CF version 9,0,1,274733, use JRun4 as the App server, on a server running Windows Server 2008 R2.

Any help is most appreciated.