diff --git a/Packets/VariantParser.ih b/Packets/VariantParser.ih
index 79db6c7eb3816746a45a625c15f4d74622e00538..275cff1fe8094f05facf6cc69188606efd0500d8 100644
--- a/Packets/VariantParser.ih
+++ b/Packets/VariantParser.ih
@@ -149,7 +149,7 @@ namespace detail {
         template <BOOST_PP_CAT(name, _chooser_value_type) (*KeyFn)()>                             \
         struct BOOST_PP_CAT(name, _key_value_template)                                            \
             : public senf::detail::VariantKey<BOOST_PP_CAT(name, _chooser_value_type), KeyFn> {}; \
-        template <class T, T (*K)()> friend class senf::detail::VariantKey;                   \
+        template <class T, T (*K)()> friend class senf::detail::VariantKey;                       \
         typedef senf::detail::VariantKeyTransform<                                                \
             BOOST_PP_CAT(name,_chooser_value_type),                                               \
             boost::mpl::vector<                                                                   \
diff --git a/Packets/VariantParser.test.cc b/Packets/VariantParser.test.cc
index e215a89758693b70ecce2db3e8e4a006afaa8d0c..2ea65d49287c8ec7d674e3b91d1a5fdebb54f880 100644
--- a/Packets/VariantParser.test.cc
+++ b/Packets/VariantParser.test.cc
@@ -78,7 +78,10 @@ BOOST_AUTO_UNIT_TEST(VariantParser)
     };
 }
 
-namespace {
+// We can't use the unnamed namespace here since there's a bug in gcc-4.2.3 which is 
+// the default version of gcc on ubuntu hardy :-(
+// See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34213
+namespace VariantParser_test_cc_anon_namespace {
     
     struct SubParser : public senf::PacketParserBase
     { 
@@ -97,8 +100,7 @@ namespace {
         SENF_PARSER_SKIP_BITS( 4 );
         SENF_PARSER_BITFIELD_RO( type, 4, unsigned );
         SENF_PARSER_VARIANT( content_, type,
-                                         ( novalue( nocontent
-, key(10, senf::VoidPacketParser)) )
+                                         ( novalue( nocontent, key(10, senf::VoidPacketParser)) )
                                          (      id( content,           SubParser              ) )
             );
 
@@ -106,6 +108,7 @@ namespace {
     };
     
 }
+using namespace VariantParser_test_cc_anon_namespace;
 
 BOOST_AUTO_UNIT_TEST(VariantParserMacro)
 {
diff --git a/senfscons/InstallIncludes.py b/senfscons/InstallIncludes.py
index dc9c81744574b6f67e0772188c25edbb7957b72f..d9bb8f443840687466a8b0e2b530a89fa1b8711d 100644
--- a/senfscons/InstallIncludes.py
+++ b/senfscons/InstallIncludes.py
@@ -17,20 +17,20 @@ def recursiveChildren(f):
     rv = {}
     map(rv.setdefault,f)    
     for c in f:
-        map(rv.setdefault,recursiveChildren(c.children()))
+        if c is not None : map(rv.setdefault,recursiveChildren(c.children()))
     return rv.keys()
 
 def filterIncludes(files, extensions):
     return [ f for f in files
-             if f.get_suffix() in extensions ]
+             if f is not None and f.get_suffix() in extensions ]
 
 def filterIncludesInv(files, extensions):
     return [ f for f in files
-             if '.' + str(f).split('.',1)[-1] not in extensions ]
+             if f is not None and  '.' + str(f).split('.',1)[-1] not in extensions ]
 
 def filterDirectory(files, dir):
     return [ f for f in files
-             if f.abspath.startswith(dir.abspath) ]
+             if f is not None and f.abspath.startswith(dir.abspath) ]
 
 def excludeDirectories(files, dirs):
     return [ f for f in files
diff --git a/senfscons/SENFSCons.py b/senfscons/SENFSCons.py
index c8ff57c4efe5a39aa331b2fcf4b5d1c46d271ec3..60e175a0da9b2ee459f0b91bef9b1d6e971a4e01 100644
--- a/senfscons/SENFSCons.py
+++ b/senfscons/SENFSCons.py
@@ -317,7 +317,8 @@ def Test(env, sources, LIBS = [], OBJECTS = []):
     if compileTestSources:
         test.extend(env.CompileCheck(source = compileTestSources))
     env.Alias('all_tests', test)
-    env.Alias(env.File('test'), test)
+    env.Command(env.File('test'), test, [])
+    #env.Alias(env.File('test'), test)
     
 
 ## \brief Build object files
@@ -348,10 +349,10 @@ def Objects(env, sources, testSources = None, LIBS = [], OBJECTS = [], no_includ
     if sources:
         obsources = [ source
                       for source in sources
-                      if not str(source).endswith('.o') ]
+                      if type(source) is type('') and not source.endswith('.o') ]
         objects = [ source
                     for source in sources
-                    if str(source).endswith('.o') ]
+                    if type(source) is not type('') or source.endswith('.o') ]
         if obsources:
             objects += env.Object(obsources)
 
@@ -371,7 +372,8 @@ def Objects(env, sources, testSources = None, LIBS = [], OBJECTS = [], no_includ
         # Hmm ... here I'd like to use an Alias instead of a file
         # however the alias does not seem to live in the subdirectory
         # which breaks 'scons -u test'
-        env.Alias(env.File('test'), test)
+        env.Command(env.File('test'), test, [])
+        #env.Alias(env.File('test'), test)
 
     return objects