When at work I have a strange problem accessing some web sites, Geekzone.co.nz, Stuff.co.nz amongst others.  If I use the internal DNS server (which points to Compass Communications servers)  the pages generally do not display correctly or at all.  If I change my pc to point directly to Xtra's dns server everything works fine.  Somethings that happen are that the Geekzone main page will not display the "Discussions" topics or if it does when I click to go into one of them the first part of the topic is displayed but the rest of the page is left blank.

 

We do run web marshal but I'm excluded from it so have full access to the outside world.

 

Any ideas what is causing this?