Index: /trunk/packages/invirt-web/code/main.py
===================================================================
--- /trunk/packages/invirt-web/code/main.py	(revision 2814)
+++ /trunk/packages/invirt-web/code/main.py	(revision 2815)
@@ -521,7 +521,7 @@
     session.begin()
     try:
-        kws = dict([(kw, fields[kw]) for kw in
+        kws = dict((kw, fields[kw]) for kw in
          'owner admin contact name description memory vmtype disksize'.split()
-                    if fields[kw]])
+                    if fields.get(kw))
         kws['machine_id'] = machine_id
         validate = validation.Validate(username, state, **kws)