**System Information**
Intel Core i7, 8 Gb RAM, AMD Radeon HD 7700
Windows 7 x64
**Blender Version**
Broken: 2.77 02cabda
Worked: 2.76b f337fea
**Short description of error**
OpenGL render always renders with transparent background.
**Exact steps for others to reproduce the error**
1. Try to render default scene using OpenGL render with Render -> OpenGL Render Options -> Alpha Mode -> Sky
In 2.76 render will come out as expected and you will get a background; in 2.77 you will always get transparent background regardless of Alpha Mode setting (which seems to do nothing in 2.77). Not a major problem I guess but still.