Sorry about the roller coaster ride over the last week or so. Some of it was just poor server performance, and other times it was me tinkering. Unfortunately new ground for me (and apparently, the entire technical expertise of the Internet!) so there was a lot of trial and error, often going backwards before making small progress forward.
As of this moment, the last set of changes made seem to be positive. Performance is where it used to be, and the server is not kicking out errors. (At some points, it was throwing hundreds of error messages a second. There was some Machiavellian comedy that occurred when - on top of everything else I was fighting - the server disk ran out of space due to the torrent of error messages.)
I like to jinx myself, so I'm going to call this 'fixed' at the moment. Please report any issues and I will tackle them as soon as I can.
Thanks again for your patience, I realize how frustrating it is when things aren't working!