I think I may have found a bug when applying NTFS Permissions to a CIFS Share/QTree (with NTFS Security Style)...
When I try to apply NTFS Permission with Windows 7 (my workstations), I get "Access is Denied" messages....and Computer Management sometimes locks up in a loop.
BUT!...When I try to apply NTFS Permissions with Windows XP or Windows 2003, I don't get any errors, and its applies just fine!!
Wild...check it out on your end, and see if you get the same results..
Let me know.