Similar things have happened to me so you're not alone with these sometimes strange happenings.
As we know, it's always best to make a backup (copy) of your Hal's (.db) brain file and put it in a safe location.
It has saved me from having to start completely over on more than one occasion.
The Plug-in thing is a source of good and, at times, not so good, happenings. The advice of unchecking all then start adding one at a time until the culprit is found, is very sound. I have found two plugins with the same name but different scripted lines within each...so proceed carefully.
OK...so when are those Upgrades coming? <nudge...nudge...>
