Hi, I recently installed cl-opengl, but had problems during compilation, regarding an asserted type (single-float) not matching a derived type (double-float). After some time of looking into the problem, I found that I was compiling in a lisp (sbcl) where I redefined *READ-DEFAULT-FLOAT-FORMAT* to DOUBLE-FLOAT) for something or other. Setting this back (or restarting) allowed compilation. I would expect that a library is independent on this. I.e. constant floats should be consistently written as either 1.0d0 or 1.0f0, no? Anyway, just thought to let you know that this _might_ cause problems for others. Or maybe others aren't so stupid to globally change *R-D-F-F*... -Sumant