intel x980, 34gb ram
nvidia gtx 750ti
nvidia gtx 480
2.77 Release Candidate [da81227]
Short description of error
"Laplace" in the Compositor node "Filter" Outputs just a plain (Alpha = 0) Image.
Either I do something wrong, or the bug is quite old. (Tested with 2.69, 2.74 and 2.77RC )
Exact steps for others to reproduce the error
Just hit render in this file.
Let me know if I'm wrong ;)