Ntpd dies with (code 11 segmentation fault) - pf 2.1 64bit

[Guest]

this happens when a pppoe connection goes down in a dual wan set up as described here
http://forum.pfsense.org/index.php/topic,66526.0.html

"kernel: pid 68257 (ntpd), uid 0: exited on signal 11 (core dumped)"

where do i find the actual dump? i can post it if needed.

update:
sometimes also this happens when pf boots