Logging in after the grid got back up I saw a friend who has been away for awhile. Turns out he only logged in because a ton of stuff was returned from the sim he designed just now. I checked my sim and all was fine but I had 4322 items out and his was full.
His perception was that somehow the item count got doubled (no way to know if that was true) but a bunch of stuff all came back into his Lost and Found.
So if you have an island or island rental you might want to take a peak and
Another two reports on the JIRA:
BUG-134270 - Someting that should be 41 LI is suddnely showing as 390
BUG-134271 - Mesh object land impact increases after roll restart Sep 7, 2017