I ran across that thread when researching, but it didn't appear to be addressing what I'm seeing.
The issue in that thread was "...the warning kicks in if the space that you're allotting for the disk cache is more than 80% of your free space."
... but in my case, I've got a 256Gb drive with (at first) nothing but system software and Adobe cc on it. Even then, and even when I stepped down from 100Gb down to 30Gb, I still got the warning. For that warning to be kicking in due to the 80% rule would mean that a fresh install of mavericks and Adobe cc ate up more than 200Gb.
I can't see how I could be near 80% of free space with those figures, but I'll dig into the stats tomorrow to make sure.