For release 3, can you PLEASE allow an increase in the DNS cache size? There really isn't any reason why it should be limited to 10MB. If you are going to create a hard limit, 1GB should be more than plenty for the average ISP using MT software. We set the max cache size on most of our other DNS servers to 500MB.
I like using the MT as the primary DNS server as it makes for simpler setup and troubleshooting with clients. I know, however, that 10MB is not enough and there have been occasional delays in going out to search when the cache is full.
Also, it would be nice to have a timeout override for how long data is kept in the cache. Some data is in the cache for a long time as configured by the domain's DNS admin. Some of these sites are not frequently accessed and we would like them dumped after a shorter period so there is more room for more commonly visited sites. Being able to set a maximum time that a record is cached without being re-accessed would be great. For example, setting a max record cache time to 1 day would drop infrequently visited sites after 24 hours, but site which are commonly requested would keep having their timer reset.