@Jeroen: You have not responded to my emails nor to this bug report. Please respond if you are still maintaining the sunbird package. Otherwise I will ask FESco to take over this package, following the process described in:
http://fedoraproject.org/wiki/Policy_for_nonresponsive_package_maintainers

@Jeroen: Ping. This is second try according to
http://fedoraproject.org/wiki/Policy_for_nonresponsive_package_maintainers

Vit, have you already by change prepared a srpm for new rubygem-rack which can be imported into rawhide / F-15 soon?

(In reply to comment #3)
> Vit, have you already by change prepared a srpm for new rubygem-rack which can
> be imported into rawhide / F-15 soon?

Sorry, not yet.

Update the changelog, and this builds fine in koji:

diff --git a/rubygem-rack.spec b/rubygem-rack.spec
index c89f2a0..7ca8373 100644
--- a/rubygem-rack.spec
+++ b/rubygem-rack.spec
@@ -6,8 +6,8 @@ Name:           rubygem-%{gemname}
 Summary:        Common API for connecting web frameworks, web servers and layers of software
 # Introduce Epoch (related to bug 552972)
 Epoch:          1
-Version:        1.1.0
-Release:        3%{?dist}
+Version:        1.2.3
+Release:        1%{?dist}
 Group:          Development/Languages
 License:        MIT
 URL:            http://rubyforge.org/projects/%{gemname}/
@@ -17,8 +17,11 @@ BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 Requires:       rubygems
 Requires:       ruby(abi) = 1.8
 BuildRequires:  rubygems
-BuildRequires(check):   rubygem(rake)
-BuildRequires(check):   rubygem(test-spec)
+BuildRequires:  rubygem(rake)
+# BuildRequires for %%check
+BuildRequires:  rubygem(bacon)
+#BuildRequires:  rubygem(fcgi)
+BuildRequires:  rubygem(test-spec)
 BuildArch:      noarch
 Provides:       rubygem(%{gemname}) = %{version}
 
@@ -77,6 +80,8 @@ do
 done
 popd
 
+rm %{buildroot}%{geminstdir}/Rakefile || :
+
 %files
 %defattr(-, root, root, -)
 %dir %{geminstdir}
@@ -96,6 +101,9 @@ popd
 %{gemdir}/specifications/%{gemname}-%{version}.gemspec

I have updated rawhide to rubygem-rack-1.3.0-1. Please test it.