Okay, it looks like there were some dead areas that couldn't be
updated. I went into the workspace, did a "svn status", and removed
all non Subversion directories. I then did a "svn update". A new build
fixed the issue of the "-1" repository number. It also reported on
about five sets of changes that were not included in previous builds.
It's been about 30 minutes since the last build, so I think the issue is solved.
Maybe I should not have the "svn update" box checked? That would make
Hudson clean out the directory and use "svn co" instead. Right? That
will increase the build times, but the build takes only 38 seconds,
and the checkout probably takes two or three minutes.