Don't want to cause trouble but here are my findings...I was getting this error on my Windows XP laptop, but not on my Vista Desktop PC.
Downloaded the new version of IS - crash kept happening
Downloaded the service pack for .Net 3.5 - crash kept happening
Deleted everquest2.exe
Ran the Eq2 Patcher updated
Ran a full scan
Copied over the 200904132116-EverQuest2.exe from Twonk.
Rebooted the PC
Problem Solved....not saying this will work for everyone but it did for me so I wanted to share.
Downloaded the new version of IS - crash kept happening
Downloaded the service pack for .Net 3.5 - crash kept happening
Deleted everquest2.exe
Ran the Eq2 Patcher updated
Ran a full scan
Copied over the 200904132116-EverQuest2.exe from Twonk.
Rebooted the PC
Problem Solved....not saying this will work for everyone but it did for me so I wanted to share.