[Dovecot] Converting mbox files with dots in names to Maildir

[Kenneth Porter]

I tried to run convert-tool from dovecot-1.2-0.rc2 on a tree of mbox files 
with some containing dots in the filenames and got this failure:

# /usr/libexec/dovecot/convert-tool ken /home/ken mbox:/home/ken/mail 
maildir:/home/ken/Maildir
Error: Mailbox conversion: Couldn't create mailbox Lists.WINE.patches: 
Mailbox already exists
Error: Internal failure
*** glibc detected *** /usr/libexec/dovecot/convert-tool: double free or 
corruption (fasttop): 0x08ce6cc8 ***


The directory in question contains these files:

# ls Lists/WINE/
announce  bugs  cvs  devel  patches  patches.20050130

Will I need to go through the (large) file tree and rename all files with 
dots in the names? If so, anyone have a script that will do that? (Changing 
the dot to dash would be fine with me.)