Short-urls impossible with WebDAV Pass Thru

I am adding a mirror repository, mirroring an http-based repository.
That repository uses a shortest-possible naming scheme ("<Location />").
For example:
     http://svnhost/repos/trunk/main.c

Now that I'm trying to mirror it, I find that the mirror doesn't like
it. It issues this error:
     SVNMasterURI value must not be a server root

(It is defined as "http://svnhost/")

My desire is for all users (not just mirror users but all users) to use
as short of an SVN url scheme as possible. Is that not possible if we
need to also mirror the site?

I had someone on the chat today refer me to a commit log:
https://svn.apache.org/r1064734
... and a bug report ...
http://subversion.tigris.org/issues/show_bug.cgi?id=3445

Thanks in advance,

-Tyler Mace

-- 
Tyler Mace, Build & Release Engineer
ThermoAnalytics, Inc
(906) 482-9560 x218
23440 Airpark Blvd, Calumet, MI 49913