I have a VNC session going and the graphs are visible but the message does appear sporadically. I installed ntop on the that machine yesterday and see:
messages:Feb 3 11:40:21 dell2400 ntop[3310]: errno 10 during sending of page to web client messages:Feb 3 11:43:25 dell2400 ntop[3310]: errno 10 during sending of page to web client messages:Feb 3 12:15:51 dell2400 ntop[3310]: errno 10 during sending of page to web client messages:Feb 3 12:21:57 dell2400 ntop[3310]: errno 10 during sending of page to web client <* snip *> messages:Feb 3 16:48:48 dell2400 ntop[3310]: errno 10 during sending of page to web client messages:Feb 4 13:16:00 dell2400 ntop[2962]: errno 10 during sending of page to web client -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org