There is a patch in the FC5 RPM, named "beagle-0.2.1-spew.patch" which hardcodes
the debug level of Beagle:

--- beagle-0.2.1/beagled/BeagleDaemon.cs.spew   2006-02-24 01:26:56.000000000 -0500
+++ beagle-0.2.1/beagled/BeagleDaemon.cs        2006-02-24 01:28:44.000000000 -0500
@@ -377,7 +377,7 @@
                                        // FIXME: We always turn on full
debugging output!  We are still
                                        // debugging this code, after all...
                                        //arg_debug ? LogLevel.Debug :
LogLevel.Warn,
-                                       LogLevel.Debug,
+                                       LogLevel.Error,
                                        arg_fg);

I can understand dialing the otherwise very verbose output down, but why not
uncomment the line immediately above this one?  As a result, it is basically
impossible to debug any runtime issues users encounter because the log level
cannot be changed in the direction of verbosity. (See
http://bugzilla.gnome.org/show_bug.cgi?id=335819 for an irritating
back-and-forth.)  Please fix this for the next release.