Saving files while BU
 

What happens if you open and save files during a scheduled BU?

That depends on whether we've already copied the contents of that folder. We don't go back and "re-copy", though...

OK - so at least no damage will be done?

No, there should be no real damage, but you should not run programs that write or use large files (e.g. Parallels, VMWare, Entourage, BitTorrent, EyeTV, etc).