DTMF problem with 4 & 5?

Asterisk 1.4.18 , debian 2.6.18

After connecting to an outside voicemail, some user had problems. After a little testing I find that the tones for four & five are not correct. Any ideas?

internally i can call the vm and the right tones are passed for 4 and 5

edit: issue appears to been resolved

bugs.digium.com/view.php?id=12059

and

bugs.digium.com/view.php?id=11855