Here’s a summary of what’s in SP1:

• Face Robot on Linux Face Robot now works on Linux! As well, many fixes have been made to Face Robot.
• Crosswalk 4.1 Softimage 2010 SP1 ships with Crosswalk v.4.1. The main purpose of the Crosswalk update is to support the Softimage Face Robot plug-in on Linux 64-bit systems. There were also a few other important fixes thrown in for good measure.
• Particle Volume Shader Many fixes have been made to the Particle Volume shader. Note that this also affects the Particle Renderer shader compound which uses this shader.
• Hair Many fixes have been made to hair on Linux.

For the full list of fixes in SP1, see the readme.