Closed by commit rBaf399884e16e.
@dingto: I'm experiencing the same thing on Mac OS 10.8.5 using an Nvidia GTX 560 (1GB VRAM).
Ok. I kinda get what your saying. Thank you I will put it down to bad design or underdeveloped.
Yeah, as @sindra1961 said, issue here is that shapekeys are “spread” across two different data types - Object and Mesh (or other geometry type of data). When you pin in 'Data' porperties context,you only pin the 'mesh' part, not the 'object' part, so features that depend also on object cannot work anymore. Note that the same goes for vgroups too.