lmtp segfault after upgrade

[Tom Sommer]

I just upgraded our Director to 2.2.29.1 from 2.2.26, and now my dmesg 
and /var/log/messages are getting flooded by these errors:

lmtp[45758]: segfault at 21 ip 00007fb412d3ad11 sp 00007ffe83ad2df0 
error 4 in libdovecot.so.0.0.0[7fb412c95000+11c000]
lmtp[46304]: segfault at 91 ip 00007f771ba64d11 sp 00007ffe830635a0 
error 4 in libdovecot.so.0.0.0[7f771b9bf000+11c000]
lmtp[45775]: segfault at 21 ip 00007f206ed81d11 sp 00007ffd0f0daad0 
error 4 in libdovecot.so.0.0.0[7f206ecdc000+11c000]
lmtp[46649]: segfault at 21 ip 00007ff4aa027d11 sp 00007ffc05841430 
error 4 in libdovecot.so.0.0.0[7ff4a9f82000+11c000]
lmtp[45774]: segfault at 21 ip 00007ff1f3e0bd11 sp 00007ffe0ba00340 
error 4 in libdovecot.so.0.0.0[7ff1f3d66000+11c000]
lmtp[45776]: segfault at 411 ip 00007f96ded95d11 sp 00007ffce6401870 
error 4 in libdovecot.so.0.0.0[7f96decf0000+11c000]
lmtp[46896]: segfault at 21 ip 00007fbf1aa70d11 sp 00007ffc79e22bf0 
error 4 in libdovecot.so.0.0.0[7fbf1a9cb000+11c000]
lmtp[46695]: segfault at 21 ip 00007fd5ccad6d11 sp 00007ffe19e759d0 
error 4 in libdovecot.so.0.0.0[7fd5cca31000+11c000]
lmtp[45773]: segfault at 21 ip 00007f0eb7b65d11 sp 00007fff9d02e570 
error 4 in libdovecot.so.0.0.0[7f0eb7ac0000+11c000]
lmtp[47101]: segfault at 21 ip 00007fa95b052d11 sp 00007fff2d5485a0 
error 4 in libdovecot.so.0.0.0[7fa95afad000+11c000]
lmtp[45772]: segfault at 21 ip 00007f2f52b49d11 sp 00007fff99a4a6e0 
error 4 in libdovecot.so.0.0.0[7f2f52aa4000+11c000]
lmtp[46595]: segfault at 21 ip 00007f0ccbdbad11 sp 00007ffd17bfe9e0 
error 4 in libdovecot.so.0.0.0[7f0ccbd15000+11c000]
lmtp[45770]: segfault at 21 ip 00007f94a576ed11 sp 00007ffc29c2ff00 
error 4 in libdovecot.so.0.0.0[7f94a56c9000+11c000]
lmtp[45769]: segfault at 21 ip 00007f34999b5d11 sp 00007ffe28818350 
error 4 in libdovecot.so.0.0.0[7f3499910000+11c000]
lmtp[47371]: segfault at 21 ip 00007f13c611fd11 sp 00007ffcdb000b10 
error 4 in libdovecot.so.0.0.0[7f13c607a000+11c000]
lmtp[47419]: segfault at 21 ip 00007f4010ff2d11 sp 00007ffd97519420 
error 4 in libdovecot.so.0.0.0[7f4010f4d000+11c000]
lmtp[47511]: segfault at 581 ip 00007fd5e3d21d11 sp 00007ffce61f29c0 
error 4 in libdovecot.so.0.0.0[7fd5e3c7c000+11c000]
lmtp[47277]: segfault at 21 ip 00007f04c3d6cd11 sp 00007ffc421da1b0 
error 4 in libdovecot.so.0.0.0[7f04c3cc7000+11c000]
lmtp[45771]: segfault at 21 ip 00007f55c690ed11 sp 00007fff35521fc0 
error 4 in libdovecot.so.0.0.0[7f55c6869000+11c000]
lmtp[47543]: segfault at 21 ip 00007f11ea946d11 sp 00007ffdd9a97690 
error 4 in libdovecot.so.0.0.0[7f11ea8a1000+11c000]
lmtp[47669]: segfault at 21 ip 00007f8f58abbd11 sp 00007ffdd5573220 
error 4 in libdovecot.so.0.0.0[7f8f58a16000+11c000]
lmtp[46959]: segfault at 41 ip 00007ff9d6f3ed11 sp 00007ffe28dc8ea0 
error 4 in libdovecot.so.0.0.0[7ff9d6e99000+11c000]

Any ideas?

-- 
Tom