diff -r d1c0b57aeb1b Lib/packaging/pypi/dist.py
--- a/Lib/packaging/pypi/dist.py	Mon May 14 19:45:27 2012 +0200
+++ b/Lib/packaging/pypi/dist.py	Mon May 14 22:39:31 2012 +0200
@@ -77,7 +77,7 @@
             if suggestion:
                 self.version = suggestion
             else:
-                raise IrrationalVersionError(version)
+                raise IrrationalVersionError("%s: %s" % (self.name, version))
 
     def get_version(self):
         return self._version
diff -r d1c0b57aeb1b Misc/ACKS
--- a/Misc/ACKS	Mon May 14 19:45:27 2012 +0200
+++ b/Misc/ACKS	Mon May 14 22:39:31 2012 +0200
@@ -947,6 +947,7 @@
 Joel Shprentz
 Itamar Shtull-Trauring
 Eric Siegerman
+Christoph Sieghart
 Paul Sijben
 Kirill Simonov
 Nathan Paul Simons