asterisk users - Jul 2006 - Voicemail Getting Cut Off after 5 seconds

I'm having a problem with voicemail messages (sometimes) getting cut off
after 4 or 5 seconds.  

Here's what show's up in my the logs:
Jul 13 14:48:17 hermes asterisk[3125]: VERBOSE[4614]:     -- Playing
'/var/spool/asterisk/voicemail/DLRVM/1060/unavail' (language
'en')
Jul 13 14:48:26 hermes asterisk[3125]: VERBOSE[4614]:     -- Playing
'vm-intro' (language 'en')
Jul 13 14:48:31 hermes asterisk[3125]: NOTICE[4614]: sched.c:224 in
ast_sched_add_variable: Scheduled event in 0 ms?
Jul 13 14:48:31 hermes asterisk[3125]: VERBOSE[4614]:     -- Playing
'beep' (language 'en')
Jul 13 14:48:32 hermes asterisk[3125]: VERBOSE[4614]:     -- Recording
the message
Jul 13 14:48:32 hermes asterisk[3125]: VERBOSE[4614]:     -- x=0, open
writing:  /var/spool/asterisk/voicemail/DLRVM/1060/tmp/x5z59O format:
wav, 0x81e1c80
Jul 13 14:48:36 hermes asterisk[3125]: WARNING[4614]: file.c:180 in
ast_writestream: Natural write failed
Jul 13 14:48:36 hermes asterisk[3125]: WARNING[4614]: app.c:638 in
__ast_play_and_record: Error writing frame

Running current (or pretty near) asterisk trunk, but I have similar
issues with trunk code from the last 4 weeks or so.
Asterisk SVN-trunk-r37380 built by root @ hermes on a i686 running Linux
on 2006-07-11 19:28:30 UTC

There's plenty of disk space on the partition and permissions are OK.
I'm a little stumped.

Any ideas?

Thanks,
-Josh C.