Okay, 4.4.1 up and running.

Search on Mozart now returning 113 hits.

One thing I did that I'd forgotten is apply a couple options from the web site, the important one being to reject IPs of 192.168.*.* and 10.*.*.*. I expected this to affect leaf nodes since it's entirely possible that many aren't properly configured. But I didn't expect to affect many Ultrapeers, and isn't the peer where searches are resolved?