blender crashing using OSL & render view ( 2.67 and up)

blender (in cycles at least) is crashing when using OSL and a material node is connected to an output OR when connecting any shader to an output node. the oldest versions with OSL work. no other versions do. some materials and objects crash faster than others. it happens with just the cube start as well. no particular error messages really.

windows 7. havent tested blender render to see if its there too.