LemonI'm sure you have but have you tried simply verifing cache?
If not, delete and remake your autoexec; I had a problem similar to this a while back, and I fixed it by deleting and remaking my autoexec.
I just tried both of those things and I still crashed :P
EDIT: I just went default hud and now things work again. But I also have no item server so I can't confirm if doing so affects this or if the no item server does.