My apologies for making so many threads - this (I hope) should be the last of them, but please don't hold me to that.
I do my own DNS, and my nameservers appear to be working. I can hit my sites, ping my predefined subdomains (mail.tld.com, etc) and email is working. I created a new subdomain, however it's not resolving a couple of hours later.
In cPanel's DNS, I see the A record listed for it, however I can't ping it. With my old Plesk setup (I've always managed my own DNS), they were available pretty much immediately, and I assume that's because the nameserver should look at MY server to resolve the subdomain.
Am I incorrect, or do I just need to be a bit more patient?