SVN woes

So I'm trying to sort out exactly what is going on with the svn repositories for the installer code I've been working on.  The symptoms seem to be that the svn client is creating repositories that the webdav svn apache module cannot interpret because they are in a newer file system version.  I saw this because of the apache error log message:

[Fri Oct 17 15:52:22 2008] [error] [client ##.##.##.###] (20014)Internal error: Expected FS format '2'; found format '3'

and this is displayed in the browser

Could not open the requested SVN filesystem

When I go out to search on the web all I can find is that webdav svn isn't supposed to work with apache 2.2.  I do have other svn repos that were made with earlier releases of tortoisesvn and svnadmin that do work still, so I'm completely confused at this point.

What I'm doing now is testing with Wamp to see if I should switch.  Just testing on a vm right now, but hopefully it works...

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Update:
I was able to get everything working with existing installation of the apache 2.2 web server already on that machine. I downloaded the latest stable release windows binary from http://subversion.tigris.org/servlets/ProjectDocumentList?folderID=8100 After recreating the repository that I wasn't able to connect to previously everything started working. (I also had to update my mod_dav_svn.so apache module with the latest release from that same zip).