Unable to expand TNEF files in Mailscanner (bug #607747)

Hi,

Since the upgrade to squeeze I'm unable to expand TNEF files (winmail.dat)
for examination, all the details are in this bug:

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=607747

<http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=607747>In the second post
there is a patch which I have applied, but the problem persists, the bug
claims the problem is in the last slash (/) when creating a directory, but
you can actually create directories like foo//bar in perl with no problems.

Permissions seem right, perl mkdir function throws this error: "No such file
or directory"

The mkdir function tries to create a subdirectory, ie mkdir "foo//bar", but
foo doesn't exists, the problem is here, there is something messed up with
the directories.

Here is a log with some debug lines of my own:

Feb 21 11:59:12 mail MailScanner[9515]: Expanding TNEF archive at
/var/spool/MailScanner/incoming/9515/AC9DD4D4039.AC0D8/winmail.dat
Feb 21 11:59:12 mail MailScanner[9515]: DEBUG(winmail.dat): mkdir Error is :
No such file or directory
Feb 21 11:59:12 mail MailScanner[9515]: DEBUG(winmail.dat): mkdir
AC9DD4D4039.AC0D8//tnefT9COXB
Feb 21 11:59:12 mail MailScanner[9515]: DEBUG(winmail.dat): current
directory: /var/spool/MailScanner/incoming/9515/B34B74D4038.AE841
Feb 21 11:59:12 mail MailScanner[9515]: DEBUG(winmail.dat): current
directory: /var/spool/MailScanner/incoming/9515/B34B74D4038.AE841 EXISTS!!
Feb 21 11:59:12 mail MailScanner[9515]: Trying to unpack nwinmail.dat in
message AC9DD4D4039.AC0D8, could not create subdirectory
AC9DD4D4039.AC0D8//tnefT9COXB, failed to unpack TNEF message
Feb 21 11:59:12 mail MailScanner[9515]: Corrupt TNEF winmail.dat that cannot
be analysed in message AC9DD4D4039.AC0D8

This is a mail released from quarantine, I'm not sure if this could be
related.

Thank you in advance

-- 
Carlos.