I have been getting this problem for some time, where I cannot change the active material in the Shaderlight material editor, which I normally do with the eye-dropper tool. It just stays stuck on the last edited material. I can only fix this by restarting SU.
I had hoped the most recent SL update might fix it, but no luck.
I have:
Shaderlight 2.4.1
Sketchup 8.0.16845
Mac OS X 10.8.2
Anyone else or is it just me?!
thanks