Steps to reproduce:
1. Write a comment in an event sheet that uses TAB spaces
2. Upon clicking off, the comment doesn't display the tabbed space (though it is still there if you click back onto the comment)
Maybe I'm being nitpicky, but a bug's a bug. I did manage to confuse myself with some notes in a comment I had, I used tabbed space and ignored the fact it didn't actually display, but today got really confused at my notes til I clicked onto it.