I can confirm your observation, Hal, but perhaps I didn't do it the same way as you. I opened the hard drive and went to /Library/Application support. Then, I did a Get Info in three ways:
1. Pressed Command-I.
2. Went to File > Get Info.
3. Clicked the Get Info icon in the HD window.
In each case, the Get Info window said "you have custom access".
However, when I Control-clicked that folder and selected Get Info from the contextual menu, the GI window said "You can read and write" instead of "you have custom access". For reasons that escape me, I then got the "you can read and write" message when I repeated 1 - 3. Go figure.
ADDENDUM: I tried the above with /Library/Application Support/Adobe and the "custom access" remained even after I repeated all those steps.
