Bug Report: can't add same revision twice

I'm getting the following error message while trying to mirror the Perl 
Perforce repository to SVK:

$ svk sync /perl5/perforce
svk: running p4 clients
svk: appending required ChangeSets, StringEdit filters
svk: running p4 labels
svk: running p4 files to find labelled files: / 117183
svk: can't extract same revision twice (corrupt source repository?): 
'//depot/win32/perl/embedvar.h#21 delete @3599 <//depot/win32/perl/> 
(text) 1999-07-06 06:27:46Z gsar "add repository.pod as toplevel R"

***BUG REPORT***
can't add same revision twice: '//depot/win32/perl/embedvar.h#1 branch 
@343 <//depot/win32/perl/> (<undef>) 1997-12-01 09:37:06Z gsar "[win32] 
Reverse integrate to get"
Please see /dev/null

I'm going to try and work out how to emulate this using the VCP client 
itself (so I can get the log file details).  I already had to hack 
SVN::Mirror::VCP to include the '--follow-branch-into' option to get it 
this far.

Any suggestions for how to proceed would be appreciated...

John

-- 
John Peacock
Director of Information Research and Technology
Rowman & Littlefield Publishing Group
4501 Forbes Boulevard
Suite H
Lanham, MD  20706
301-459-3366 x.5010
fax 301-429-5748