+Why would you need this? When you change the default ACL on a
+directory, it doesn't affect any of the files in that directory. So,
+if change the default ACL on a directory to allow group-read access,
+then you still have to manually allow group-read access on every file
+in that directory. That wouldn't be so bad, except that you need to do
+it recursively, and the \fBsetfacl\fR command is different for files
+and directories. Instead, once you've set the default ACL, you can use
+apply-default-acl to \(dqreset\(dq the permissions on everything in
+the directory. The differences between files and directories are
+handled for you.
+.P
+Another reason is that several common utilities like \fBcp\fR and
+\fBtar\fR will call \fBchmod\fR on the files that they create without
+regard for your default ACLs. When those utilities try to preserve
+group permissions, they are actually affecting your ACL mask, and this
+can prevent your default permissions from taking effect. For example,
+if you \fBcp\fR a file that is not group-writable into a directory
+that has a default ACL, the effective write permissions will all be
+masked when \fBcp\fR clears the group-write (that is, the mask-write)
+bit. Calling apply-default-acl on the files created by these utilities
+fixes the permissions.