FF running perfect, then..

Warning! Encountered old format VTF file; please rebuild it!
Error reading in file "materials/models/grenades/napalm/napalm_glass.vtf"
Warning! Encountered old format VTF file; please rebuild it!
Error reading in file "materials/models/buildable/detpack/detpack_glass.vtf"

and a bunch of the same errors for level files cubewell/something

I just put the -dxlevel 70 in my shortcut to the game and it was running awsome, better fps and no sound loop crashes. I killed a few people, then got killed. Then I couldnt respawn. Tried changing teams and servers, still cannot spawn.
I made my own server on ff_dm and as soon as I picked a class the camera just dropped to the level floor and stayed there.

Any suggestions?

[Apathy]

Yes, I also had this problem. It does have something to do with -dxlevel 70. I have no idea for any permanent fixes, but you can re-select your class, and it will let you spawn again. (At least for me)