I had the same issue with having to clear cache and relog to regain my inventor after installing the lasterst FIrestorm update. It would have every 2nd log in or so, got way way old. Alos experiencing my group settings changing and the LMs i have saved at the top of my screen changing postions from the way they are set. Also, my voice stopped working for inworld. I can use voice in a call inworld, but not unless I was in a call. I dealt with this for about a month until it just got way to irritating and time consuming to be resetting major items every day or two. My solution ? I went back to the previous upload. My inventory has loaded properly every time. I suppose I will be staying with this 6.5.6.66221 version until I know the bugs are fixed.