And seeing if things are massively broken or not.
It may or may not have broken the links to all of the individual posts and pages. I moved server* at the same time as upgrading wordpress (Oh Hai silly idea, how are you today? What, you think I should change two things at once, to make it harder to debug?), so something needs fixing.
*Yes, I know, I should have some form of config management in place, which would have made this both quicker, and would have allowed me to rule out "Mat did something wrong in the apache config" option ;-)
Right, more playing around...