Re: Quadro FX 540 and glReadPixels...
The call looks ok, but the result suggests that the size of 'GL_FLOAT' is incorrectly
set/interpreted somewhere along the line, because the numbers look like 32-bit floats in 64-bit double spaces...
I normally only do GLReadPixels with GL_UNSIGNED_BYTE as type (which has
kept me out of trouble so far)