Description of problem:
rpmbuild --rebuild xulrunner-1.9-0.beta5.6.el5.src.rpm produces a warning about
wrong find -maxdepth syntax and later crashes because glob %{mandir}/man1/*
can't find any files. There are indeed no files there to be found. 

The following fixes both problems:

--- xulrunner.spec.orig 2008-04-28 09:20:30.000000000 +0200
+++ xulrunner.spec      2008-05-22 15:41:58.000000000 +0200
@@ -174,12 +174,12 @@
 %{__install} -p -D -m 644 rh-default-prefs
$RPM_BUILD_ROOT/${MOZ_APP_DIR}/defaults/pref/all-redhat.js
 %{__rm} rh-default-prefs

-%{__install} -p -D -m 644 %{SOURCE23} $RPM_BUILD_ROOT%{_mandir}/man1/%{name}.1
+#%{__install} -p -D -m 644 %{SOURCE23} $RPM_BUILD_ROOT%{_mandir}/man1/%{name}.1

 %{__rm} -f $RPM_BUILD_ROOT${MOZ_APP_DIR}/%{name}-config

 cd $RPM_BUILD_ROOT${MOZ_APP_DIR}/chrome
-find . -name "*" -type d -maxdepth 1 -exec %{__rm} -rf {} \;
+find . -maxdepth 1 -name "*" -type d -exec %{__rm} -rf {} \;
 cd -

 # system extensions and plugins support
@@ -318,7 +318,7 @@
 %files
 %defattr(-,root,root,-)
 %{_bindir}/xulrunner
-%{_mandir}/man1/*
+#%{_mandir}/man1/*
 %{_libdir}/mozilla
 %{_datadir}/mozilla
 %dir /etc/gre.d