I am also happy to report that a spot check of globdemonstrates no immediate ability to confuse it or get the wrong answers back. Way back in the old days it failed frequently for me in a Windows environment -- I no longer remember how, but suspect the use of drive letters and current directory on each were amongst the issues.

However, I threw, off the cuff, a bunch of potential curve balls at globrecently and I was very happy to discover it worked perfectly on every test I could think of in 90 seconds.

Hardly deterministic, but I used to be able to break it without having to work at it, so something has gotten better -- or perhaps I have simply become less warped.