[mythtv-users] How to handle schedule pre-emptions?

[makalu at ansae.com]

So the President held a one-hour news conference last night, then each of 
the networks did their own thing afterwards. For example NBC dropped the 
8:00 shows and went right to The Donald, while CBS showed everything 
delayed. As a result, the zap2it-provided schedules were no longer accurate. 
Is there any way to handle this if you had previously scheduled recordings 
whose times were now all wrong?