**System Information**
Windows 7 Ultimate 64-bit SP1
Gigabyte Windforce Radeon 7970 Ghz Edition 3GB
**Blender Version**
Broken: 2.70 RC2 Date: 2014-03-12 17:57 Hash: 2525f9c
Worked: 2.70 RC1 Date: 2014-03-05 18:37 Hash: 19f7f9a
**Short description of error**
Any attempt at using GPU rendering causes **OpenCL error (-61): Invalid buffer size**.
**Exact steps for others to reproduce the error**
Set default cube to Cycles, GPU render, then set the viewport to rendered.