In a sick, twisted way, nice to see others experiencing this. Ever since the release of ToL, I have experienced random "crashes" across the four accounts / three computers here. No smoking gun per se. This is the link to the post I have currently. Random crashing | EverQuest Forums (daybreakgames.com)
Alright, there's another speculative fix in for this with today's update: Please reply to this thread if you're still experiencing this crash after servers are unlocked!