[rt-users] RT2 just stops working?

[RT2 Troubles]

We recently added a few queues to our RT2 install and suddenly correspondence 
is not getting delivered.. I looked for an error and didn't find one in 
maillog or messages.. I tried nuking rt2/local/templates, just incase that 
was a problem and still RT2 *thinks* it sent correspondence but none is sent. 
Is there a good spot to search for error logs or a method I can apply to 
tracking the problem? Anyone have experience with this sort of delivery 
failure?

Thanks in advance..