A related issue is that the Subversion/Perl Swig bindings are really painful to build. Getting them from an OS/distribution package is great if you are using the corresponding perl and subversion packages. If you have a different perl and/or subversion build then you're on your own.

I made a stab ages ago at building a simple direct Perl/XS binding to the SVN libs but never got enough time and finally got the SVN bindings building properly in our build system.

This dependency seems to me the biggest barrier to user and developer adoption to SVN::Web. I ended up deciding that using Trac or Warehouse (from the Lighthouse app people) was an easier route, especially since my desire to tweak was low. Of course if you want to tweak in Perl then those solutions won't help.