the vfs_acl_* man pages claim: There are no options for vfs_acl_xattr. But there is at least the ignore system acls option that is there.
f452add2231906742c9fd119371cd4fd81a1bdd6 fixes that. Karolin: we shoulod fix this in 3.6 and 3.5.
Pushed to both branches. Closing out bug report. Thanks, Björn!