ucspi-tcp-0.88-r2 includes patch for ipv6 if ipv6 USE var is set As it is set in make.defaults, the ipv6 will be compileld in on most systems. The problem is that it[tcp*] then will use ipv6 by default, but on most systems, ipv6 is not even compiled into the kernel (I know I don't include it. There's not much use for it, so why wasting ram). So the result will be that all tcp* apps, as well as all other programs that use them[like qmail that uses tcpserver] will fail to run. In the qmail+daemontools case, the simptom would be that after a reboot you'll see tcpserver zomby process that's restarted every fraction of a second.
Hopefully I fixed that yesterday, as I changed the various profiles/default-*/make.defaults so that "ipv6" is no longer in USE by default.
