Intermittant "page cannot be displayed" problems

["D & E Radel" <radel@xxxxxxxxxxx>]

Hi there.

Our users are complaining of intermittant squid problems. Browsers will 
show "page cannot be displayed" (e.g. for www.google.com) but hitting 
refresh, the page will be displayed ok. Everything was going alright for 
months, but now this problem.

The only things I have done are add a few extra sites to the list of 
blocked sites and updated the squid security patches in debian stable 
the other day.  What kind of things can I try to figure out why squid is 
doing this? We have about 80 users, but it was doing this the other 
night when no-one was onsite.

Thanks in advance.
D.R.