freebsd-update 7.0->7.4 problem: rmdir "Directory not empty"

[Brent Bloxam]

I'm going through the freebsd-update process to move from 7.0 to 7.4. I 
followed the handbook, rebooted to GENERIC and followed up with 
`freebsd-update install` and got the following output:

> # freebsd-update install
> Installing updates...rmdir: ///usr/share/man/ja: Directory not empty
> rmdir: ///usr/share/man/en.ISO8859-1/cat8: Directory not empty
> rmdir: ///usr/share/man/en.ISO8859-1/cat4: Directory not empty
> rmdir: ///usr/share/man/cat8: Directory not empty
> rmdir: ///usr/share/man/cat4: Directory not empty
>  done.

Are these rmdir lines something to be concerned about? Should I remove 
them and their content?