Ok, this issue has been bugging me for some time and I’d like to know if it’s something specific to my setup or a widely known issue.
I’m getting some wacky behaviour with the UI not updating properly for material and texture previews - particularly when nodes are brought into the equation. Also, the rendered output can be at odds with the scene setup.
Blender 2.4* and earlier occasionally had similar UI glitches, but not like this:
I’ve haven’t seen many comments about this on the forums. Apologies if it’s already been discussed somewhere.