asterisk users - May 2007 - ast_parse_allow_disallow: Cannot disallow unknown format ''

Hello, everyone. I've installed asterisk SVN-branch-1.4-r62942 and every
time I reload asterisk I get this in CLI:

    -- Reloading module 'app_playback.so' (Sound File Playback
Application)
[May  3 20:04:26] NOTICE[13892]: app_playback.c:455 reload: Reloading
say.conf
  == Parsing '/etc/asterisk/say.conf': Found
[May  3 20:04:26] WARNING[13879]: frame.c:1289 ast_parse_allow_disallow:
Cannot disallow unknown format ''
[May  3 20:04:26] WARNING[13879]: frame.c:1289 ast_parse_allow_disallow:
Cannot disallow unknown format ''
[May  3 20:04:26] WARNING[13879]: frame.c:1289 ast_parse_allow_disallow:
Cannot disallow unknown format ''
[May  3 20:04:27] WARNING[13879]: frame.c:1289 ast_parse_allow_disallow:
Cannot disallow unknown format ''

Is that something to worry about?
Thanks