copy and paste from TMW documentation and/or documentation of FileExchange scripts.

Using 2015a and Mac OS (Yosemite), I can no longer reliably copy and paste snippets of example code from the help documentation. I used to be able to do this easily. Sometimes, I can still do so but mostly I can't.

I've tried several different ways of highlighting, and attempting to copy. I've looked through the setup but I couldn't see anything to improve the situation there. Maybe I've misunderstood something.

Also I can't copy and paste from the help screen of FEX files - and I used to be able to do this easily as well.

How can I copy and paste code snippets? Or is the ability lost?