All users can use /reload?

Running Build #1317 on Windows 7 Pro SP1 64-bit.
Java version "1.6.0_27"
Java(TM) SE Runtime Environment (build 1.6.0_27-b07)
Java HotSpot(TM) Client VM (build 20.2-b06, mixed mode, sharing)

I'm having a problem where all users can use /reload, despite them not having been given a node to do so or being set as ops. The permissions plugin I use is PermissionsEx, and the default permissions are as follows:

Code:

groups:
    default:
        permissions:
        - commandbook.who
        - commandbook.motd
        - commandbook.rules
        - commandbook.msg
        - commandbook.afk
        - commandbook.whereami
        - commandbook.whereami.compass
        - lwc.protect
        prefix: '&7'
        suffix: '&f'
        default: true

Any help would be appreciated.

Nevermind, it turns out that just I can use this when I de-op myself, but no one else can.
It's strange, but it seems safe anyway.