asterisk users - Sep 2007 - Problem with asterisk 1.4.11 and playing files to meetme conference

I am using asterisk Version: 1:1.4.11~dfsg-1 as found in Debian. I'm
using a call file to connect a meetme conference to an AGI script which
plays files using the stream_file method. I have four files which should
play in sequence, though only the first two files actually play. I get
these errors in the CLI:

[Sep 16 06:20:43] NOTICE[18424]: app_meetme.c:1911 conf_run: Audio
bytes: 276  Buffer size: 320
[Sep 16 06:20:43] NOTICE[18424]: app_meetme.c:1911 conf_run: Audio
bytes: 320  Buffer size: 276
[Sep 16 06:20:44] NOTICE[18424]: app_meetme.c:1911 conf_run: Audio
bytes: 18  Buffer size: 320
[Sep 16 06:20:44] WARNING[18424]: app_meetme.c:1599 conf_run: Unable to
set buffering information: Invalid argument
[Sep 16 06:20:44] WARNING[18423]: file.c:626 ast_readaudio_callback:
Failed to write frame
[Sep 16 06:20:44] WARNING[18423]: file.c:626 ast_readaudio_callback:
Failed to write frame
[Sep 16 06:20:44] NOTICE[18423]: pbx_spool.c:371 attempt_thread: Call
completed to Local/11004 at confplay 

This setup worked without problems under asterisk 1.2.

Any idea of what's going on? I'd be happy to provide more
information if needed.
-- 
Chris Nestrud
Email: ccn at panix.com
http://www.panix.com/~ccn/