Thanks, everybody.
That was my /tmp directory, as you said. It was mounted with 16 Mb 
inside the vserver. I corrected that and it works now.
All I have to do is updating my other servers in squeeze :)

Thanks again.
Jean-François

------------------------------------------------------------------------------
Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and 
threat landscape has changed and how IT managers can respond. Discussions 
will include endpoint security, mobile security and the latest in malware 
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
Bacula-users mailing list
Bacula-users AT lists.sourceforge DOT net
https://lists.sourceforge.net/lists/listinfo/bacula-users