Hmm, I experienced the issues for the first time with 2 users, both members of the same group, with group privilege being R/W on the whole Volume_1.
I then did the reset to fix it and set Volume_1 to R/W for ALL. There are still 2 users, both members of the same group, to access the DNS but the issue did re-appear
I can't spot anything set up wrong which could lead to that effect. As well if I connect with any of the 2 users from Win 7 I do not have access to those files, if I connect with the Mac I do.
I did analyze a bit further and it looks like the files with issues where saved from Win 7 (with PSE 8 ). Next thing I try is set back OpLocks to 'No' as this might make a platform depended difference ... ?
Again, any hint welcome !