sound juicer doesn't strip special characters in file_pattern %dn (disc an track number)

[by-erik]

Binary package hint: sound-juicer

Description: Ubuntu 9.10
Release: 9.10

sound-juicer:
  Installed: 2.28.0-1
  Candidate: 2.28.0-1
  Version table:
 *** 2.28.0-1 0
        500 http://de.archive.ubuntu.com karmic/universe Packages
        100 /var/lib/dpkg/status

Strip special characters doesn't work as expected.
When i check 'Strip special characters' the example path switched from
'Disc 1 - 7 - Ticket_To...'
to
'Disc 1 - 7_-_Ticket_To...'

I expect that it have to switch to 'Disc_1_-_Ticket_To...'

best regards
   eriK