When using the DNS editor on clueless, the drop-down box for TTL has "1 second", "1 minute", "1 hour", "1 day". This is rather coarse-grained -- "1 second" and "1 minute" (and "1 minute" and "1 hour") are nearly two orders of magnitude apart.
Can "10 seconds", "10 minutes", and "6 hours" (for example) be added to the available options?