This is a very annoying bug that comes and goes. Interaction within the Advanced Loot window sometimes causes EQ to completely crash out to desktop. Sometimes there is a small freeze-up before crashing, other times it's just straight out. Had this happen on two of my computers yesterday, when trying to loot some healing vials for a Bixie warfront HA. This time, it happened to be the same item in the advanced loot window that I was trying to loot. Other times, it appears to be completely random. There is a split second you know it's coming, when clicking on a box in the advanced loot window and there's no response.
Does this fix address raid leaders (or raid master looter, more specifically) crashing in some situations with advanced loot when someone leaves the raid?
I'm hoping so. If it happens to you again, please create a new thread so we can do more investigating!