> Question please: how can I see what was missed? I got 
home 
> yesterday only to find that an important part of a site 
was 
> actually on another server but I'd missed that because I 
> didn't have a rule.

Hum, this isn't something really easy to do ; because 
during a mirror there are a LOTS of (external) 
links "missed", and listing them all would be quite long. 
But this might be an interesting list option in a future 
release?