Airtime 2.2.1: Uploaded MP3 file appears to be corrupted and will not be added to media library

Hi

OS: Ubuntu server 11.10 64 bit
Airtime 2.2.1 clean (without update) install from archive

The trouble is concerned with mp3 file uploading. When we try to upload any mp3 file, this error appears. Files were uploaded to /tmp/plupload, but they are invisible in the library.

You can see the technical information below:

2013-01-14 01:22:53,814 INFO - [Thread-2] [replaygainupdater.py : run()] : LINE 69 - Runnning replaygain updater
2013-01-14 01:22:54,287 INFO - [Thread-2] [api_client.py : get_files_without_replay_gain_value()] : LINE 695 - update file syst
em mount: []
2013-01-14 01:22:54,487 DEBUG - [Thread-2] [api_client.py : update_replay_gain_values()] : LINE 718 -
2013-01-14 01:22:54,487 INFO - [Thread-2]
[replaygainupdater.py : main()] : LINE 61 - Processed: 0 songs
2013-01-14 01:27:54,580 INFO - [Thread-2] [replaygainupdater.py : run()] : LINE 69 - Runnning replaygain updater
2013-01-14 01:27:55,033 INFO - [Thread-2] [api_client.py : get_files_without_replay_gain_value()] : LINE 695 - update file syst
em mount: []
2013-01-14 01:27:55,239 DEBUG - [Thread-2] [api_client.py : update_replay_gain_values()] : LINE 718 -
2013-01-14 01:27:55,240

INFO - [Thread-2] [replaygainupdater.py : main()] : LINE 61 - Processed: 0 songs
media-monitor.log

2013-01-14T01:19:30+04:00 INFO (6): [StoredFile.php : uploadFile() : line 832] - /usr/share/airtime/application/models/StoredFile.php:u
ploadFile(): filename=p17gqsfht7rvp1anc1dti3i71ps87.mp3 to /tmp/plupload
2013-01-14T01:19:38+04:00 INFO (6): [StoredFile.php : uploadFile() : line 832] -
/usr/share/airtime/application/models/StoredFile.php:u
ploadFile(): filename=p17gqsfht7rvp1anc1dti3i71ps87.mp3 to /tmp/plupload
2013-01-14T01:19:39+04:00 INFO (6): [StoredFile.php : copyFileToStor() : line 925] - copyFileToStor: moving file /tmp/plupload/p17gqsfh
t7rvp1anc1dti3i71ps87.mp3
zendphp.log

Locale is presented just in case:

LANG=ru_RU.UTF-8
LANGUAGE=
LC_CTYPE="ru_RU.UTF-8"
LC_NUMERIC="ru_RU.UTF-8"
LC_TIME="ru_RU.UTF-8"
LC_COLLATE="ru_RU.UTF-8"
LC_MONETARY="ru_RU.UTF-8"
LC_MESSAGES="ru_RU.UTF-8"
LC_PAPER="ru_RU.UTF-8"
LC_NAME="ru_RU.UTF-8"
LC_ADDRESS="ru_RU.UTF-8"
LC_TELEPHONE="ru_RU.UTF-8"
LC_MEASUREMENT="ru_RU.UTF-8"
LC_IDENTIFICATION="ru_RU.UTF-8"
LC_ALL=

Thank you for your help!