OK update time. Uninstalled Parallels and ran Boot Camp and reinstalled Windows 7. Went through all the updates, etc and reinstalled Hoster. Since I didn't quite allocate enough space to the partition (
) I left the KMA files on an external drive and pointed to them and rebuilt the songs database. Fired up a particularly "fast" song and it looks like it's tracking perfectly. So 4.1 seems to be working fine. I've ordered and backordered and cancelled one place for the ESI Gigaport HD external USB sound card and still waiting on it to come in. Then it will be time to pull out all the equipment and give it a full run through.