DNS scavenging and static IP's

I ran into this situation at work and have been trying to track down an answer but no luck yet. DNS scavenging as I understand it will remove DNS records that grow stale beyond the time frame specified in the scavenging settings. If you are using dynamic updates with DHCP then the records don't grow stale as long as the refresh rate isn't too long.
But what about statically assigned IP addresses? Most of our servers have exclusions in the DHCP scope and a static IP address on the NIC. I can run ipconfig /registerdns to create their records in DNS but will they be scavenged later on? Do they have a refresh period that happens automatically or can be configured? Or are they recognized as static and never grow stale? Any clarification would be much appreciated.
But what about statically assigned IP addresses? Most of our servers have exclusions in the DHCP scope and a static IP address on the NIC. I can run ipconfig /registerdns to create their records in DNS but will they be scavenged later on? Do they have a refresh period that happens automatically or can be configured? Or are they recognized as static and never grow stale? Any clarification would be much appreciated.

Comments
If you leave the DNS scavenging settings at their defaults (7 days) you should not have any problems with statically assigned IP addresses and dynamic DNS registration.
HTH
Francois
http://support.microsoft.com/kb/932464
And also here:
http://support.microsoft.com/kb/816592
Which states in part: