Hi Matt,
I was able to duplicate this using Firefox 4 but it looks like scheduling still works as it should. One thing I want to mention is that that message should no longer be coming up when we push out the latest update to Method which is planned to go live today.
-Michael
Michael Melo
Product Manager
Method Integration Inc.
Website: http://www.method.me
LinkedIn: http://www.linkedin.com/in/MichaelMelo