Subversion dies on pkill checkout

Greetings, I just subscribed.  I'm an experienced coder, but very much a 
newbie with FreeBSD.  This is the first of what will likely be many 
questions. :-D

When I try to do an svn co of head, or if I do an svn update from the 
head directory after doing the checkout, I get the following error:

A    tools/regression/usr.bin/pkill/pkill-t.t
svn: In directory 'tools/regression/usr.bin/pkill'
svn: Can't move source to dest
svn: Can't move 
'tools/regression/usr.bin/pkill/.svn/tmp/prop-base/pgrep-s.t.svn-base' 
to 'tools/regression/usr.bin/pkill/.svn/prop-base/pgrep-s.t.svn-base': 
No such file or directory

I'm not sure if this is a problem in the repository or with my build of 
Subversion.  I'm using Subversion 1.5.4.

I'm doing this checkout on a Macintosh laptop running Mac OS X 10.4.11. 
  I just wanted to have the FreeBSD source tree on my laptop so I could 
browse the sources, not to actually build them - I'll be doing my actual 
FreeBSD development on a Xeon PC.

Here is the command line I used for my anonymous checkout:

$ svn co http://svn.freebsd.org/base/head

Thanks for any advice you can give me.

Mike
-- 
Michael David Crawford
mdc_at_prgmr.com

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