Batch publish mode?

Thanks Walt. That's a good point that I should save before mass publishing in case I cause my whole computer to crash. But it looks like once you see the "Congratulations! Publish Successful!" screen then you can assume everything has worked as expected. 

I don't know why but in my head I thought that if you published 2 courses at the same time then random bits of text or objects from one course when start appearing in the other one!