Signification of a warning of Watchdog

[LaurentR]

Hello,

When I run watchdog in Plesk 8.2, I get this warning :

* Filesystem checks
Checking /dev for suspicious files... [ OK ]
Scanning for hidden files... [ Warning! ]
---------------
/dev/.udev
/dev/.static /etc/.pwd.lock
/etc/.java
---------------
Please inspect: /dev/.static (directory)

Could someone enlighten me on his signification, please ?

Thank you...