I recently transferred domain vesic.org to DreamHost. One of the usual checks that I perform afterwards is to see what http://www.dnsreport.com/ says about new domain parameters.
I found couple of FAIL sections:
"ERROR: You have one or more lame nameservers. These are nameservers that do NOT answer authoritatively for your domain. This is bad; for example, these nameservers may never get updated. The following nameservers are lame:
Stealth NS record leakage:
"Your DNS servers leak stealth information in non-NS requests:
Stealth nameservers are leaked [TLD4.ULTRADNS.ORG.]!
Stealth nameservers are leaked [TLD5.ULTRADNS.info.]!
Stealth nameservers are leaked [TLD6.ULTRADNS.CO.UK.]!
Stealth nameservers are leaked [TLD1.ULTRADNS.NET.]!
Stealth nameservers are leaked [TLD2.ULTRADNS.NET.]!
Stealth nameservers are leaked [TLD3.ULTRADNS.ORG.]!
This can cause some serious problems (especially if there is a TTL discrepancy). If you must have stealth NS records (NS records listed at the authoritative DNS servers, but not the parent DNS servers), you should make sure that your DNS server does not leak the stealth NS records in response to other queries."
Do you have same problems with your domains?