diff --git a/system-config-printer-NPTLpdQueue.patch b/system-config-printer-NPTLpdQueue.patch
new file mode 100644
index 0000000..1c5d257
--- /dev/null
+++ b/system-config-printer-NPTLpdQueue.patch
@@ -0,0 +1,25 @@
+diff -up system-config-printer-1.2.5/system-config-printer.py.NPTLpdQueue system-config-printer-1.2.5/system-config-printer.py
+--- system-config-printer-1.2.5/system-config-printer.py.NPTLpdQueue	2010-10-22 11:18:13.000000000 +0200
++++ system-config-printer-1.2.5/system-config-printer.py	2010-10-22 11:18:13.000000000 +0200
+@@ -6083,6 +6083,9 @@ class NewPrinterGUI(GtkGUI):
+         self.btnNPTLpdProbe.set_sensitive (len (hostname) > 0)
+         self.setNPButtons()
+ 
++    def on_cmbentNPTLpdQueue_changed(self, cmbent):
++        self.setNPButtons()
++
+     def on_btnNPTLpdProbe_clicked(self, button):
+         # read hostname, probe, fill printer names
+         hostname = self.cmbentNPTLpdHost.get_active_text()
+diff -up system-config-printer-1.2.5/ui/NewPrinterWindow.glade.NPTLpdQueue system-config-printer-1.2.5/ui/NewPrinterWindow.glade
+--- system-config-printer-1.2.5/ui/NewPrinterWindow.glade.NPTLpdQueue	2010-10-12 18:03:22.000000000 +0200
++++ system-config-printer-1.2.5/ui/NewPrinterWindow.glade	2010-10-22 11:19:51.000000000 +0200
+@@ -752,7 +752,7 @@ ipp://printer.mydomain/ipp</property>
+                                             <accessibility>
+                                               <relation type="labelled-by" target="label201"/>
+                                             </accessibility>
+-                                            <signal name="changed" handler="on_entNPTDevice_changed"/>
++                                            <signal name="changed" handler=on_cmbentNPTLpdQueue_changed""/>
+                                           </object>
+                                           <packing>
+                                             <property name="left_attach">1</property>
diff --git a/system-config-printer.spec b/system-config-printer.spec
index d8896cf..4518a16 100644
--- a/system-config-printer.spec
+++ b/system-config-printer.spec
@@ -7,7 +7,7 @@
 Summary: A printer administration tool
 Name: system-config-printer
 Version: 1.2.5
-Release: 3%{?dist}
+Release: 4%{?dist}
 License: GPLv2+
 URL: http://cyberelk.net/tim/software/system-config-printer/
 Group: System Environment/Base
@@ -18,6 +18,7 @@ Source1: http://cyberelk.net/tim/data/pycups/pycups-%{pycups_version}.tar.bz2
 Source2: http://pypi.python.org/packages/source/p/pysmbc/pysmbc-%{pysmbc_version}.tar.bz2
 Patch1: system-config-printer-InstallPrinterDrivers-debug.patch
 Patch2: system-config-printer-mfg-mdl.patch
+Patch3: system-config-printer-NPTLpdQueue.patch
 Patch101: pysmbc-doczip.patch
 BuildRequires: cups-devel >= 1.2
 BuildRequires: python-devel >= 2.4
@@ -84,6 +85,9 @@ printers.
 # (bug #643073).
 %patch2 -p1 -b .mfg-mdl
 
+# Don't check ComboBoxEntry for allowed characters (bug #644131).
+%patch3 -p1 -b .NPTLpdQueue
+
 pushd pysmbc-%{pysmbc_version}
 %patch101 -p1 -b .doczip
 popd
@@ -207,6 +211,9 @@ rm -rf %buildroot
 exit 0
 
 %changelog
+* Fri Oct 22 2010 Jiri Popelka <jpopelka@redhat.com> 1.2.5-4
+- Don't check ComboBoxEntry for allowed characters (bug #644131).
+
 * Thu Oct 14 2010 Tim Waugh <twaugh@redhat.com> - 1.2.5-3
 - Always use MFG and MDL fields for InstallPrinterDrivers interface
   (bug #643073).