Since you can't comment on the documentation anymore (boo!), I'd note that if your Subversion repository allows changes to unversioned properties (e.g. edit commit messages), you can have Fisheye automatically rescan the change via a Post-revision Property Change Hook utilizing a Fisheye command-line option.
Our Fisheye and Subversion are co-hosted on a Windows server and the FISHEYE_HOME environment variable is configured, so the below works for us:
@ECHO OFF
setlocal
set REPOS=%1
set REV=%2
set PROJ=<em>RepoName</em>
set FE="%FISHEYE_HOME%\bin\fisheyectl.bat"
%FE% rescan %PROJ% %REV% %REV% >&2
exit