its finally fixed. I dont know if it is really the solution but the solution came about after the following.
putting two NS Servers records in the ISPConfig 3 DNS zones instead of just one ns server seemed to solve the problem.
i.e. I now have ns1.mbitservices.com.au and ns2.mbitservices.com.au both set as
my ISCconfig public ip address. And I add these as both ns servers for each site. entered both at the registrar for the site,
and in ISPConfig and voila, all new sites work.
Last edited by mdkberry; 29th September 2011 at 13:11.