Rule #1 - Be Patient - Rule #2 - Don't ask when, if you don't contribute - Rule #3 - You have coding skills - LinuxMCE's small brother is available: http://www.agocontrol.com
I've seen the exact same with the Marantz SR template (that is the reason why it stayed unfixed for such long time)
was that 0710 or 0810?
This is a known issue and is being worked on...I should be getting around to fixing this in the next couple of weeks
It only happens while editing existing device templates. (If you start your own device, you can work on it with no problems, it only happens to device templates that already exist in sqlCVS).