Not sure what this means on 10.1 freebsd-update to 10.1-RELASE-p2

[John Levine]

>root at ns2:~ # freebsd-update install
>Installing updates...rmdir: ///: Is a directory
> done.
>root at ns2:~ # 

Known bug.  Looks scary but since your root directory was not empty,
it didn't do anything.

R's,
John