OS X Yosemite 10.10.1
Processor: 2.8 GHz Intel Core i7
Memory: 8 GB 1067 MHz DDR3
Graphics: ATI Radeon HD 4850 512 MB
Broken: 2.76 rc3 Hash:fb78f6d Branch:master(modified) 2015-09-30 16:05
Worked: unknown (was also broken in 2.75)
**Short description of error**
Enabling Open Shading Language in the Render context causes the Vector Transform node to return incorrect results.
**Exact steps for others to reproduce the error**
1. Create a Cycles material that relies on the Vector Transform node
2. Enable OSL and watch it break.
Here is [[ https://dl.dropboxusercontent.com/u/686388/posts/blenderbugreports/enabling_osl_breaks_vector_transform_node.blend | a .blend ]] I've prepared that can be used to test this quickly.