[Grml] df: `/dev/.static/dev': Permission denied

[T]

Hi

Whenever I run df, I get `/dev/.static/dev': Permission denied:

$ df
Filesystem           1K-blocks      Used Available Use% Mounted on
rootfs                 4032092   2411436   1415832  64% /
/dev/root              4032092   2411436   1415832  64% /
df: `/dev/.static/dev': Permission denied
tmpfs                    10240       180     10060   2% /dev
tmpfs                   386576         0    386576   0% /dev/shm
[...]

what might be the problem? the cure?

I'm using grml 0.7 hd installation. 

thanks

tong

PS. 

I remember seeing boot up message related with /dev/.static/dev, but I
can't seem to find them:

cd /var/log
grep 'dev/\.static' dmesg messages sysl
zgrep 'dev/\.static' dmesg.1.gz messages.1.gz syslog.1.gz 

both grep find nothing.