thunderbird-3.0.6 stuck in ucond upon start

Hi,

it looks like on this CURRENT:
FreeBSD acer 9.0-CURRENT FreeBSD 9.0-CURRENT #0 r210736: Sun Aug  1
21:51:37 CEST 2010
rene_at_acer:/usr/obj/usr/home/rene/freebsd/clangbsd/sys/GENERIC  amd64

thunderbird is always stuck in ucond upon start, however it is killable.

This is a clangbsd kernel (GENERIC, with WITNESS), r210319 with gccbsd
userland, r209980 and gcc-compiled up-to-date ports.
The following modules are loaded:
acer % kldstat
Id Refs Address            Size     Name
 1   26 0xffffffff80100000 f96790   kernel
 2    1 0xffffffff81097000 570f8    iwn5000fw.ko
 3    1 0xffffffff810ef000 29778    snd_hda.ko
 4    2 0xffffffff81119000 85e20    sound.ko
 5    1 0xffffffff8119f000 1c480    if_iwn.ko
 6    1 0xffffffff81212000 3a85     linprocfs.ko
 7    1 0xffffffff81216000 1de5d    linux.ko
acer %

Regards,
Rene