--- softwareproperties/ppa.py_orig	2012-09-28 09:17:48.000000000 -0400
+++ softwareproperties/ppa.py	2013-03-06 00:05:07.971835136 -0500
@@ -83,6 +83,9 @@
     curl.setopt(pycurl.HTTPHEADER, ["Accept: application/json"])
     curl.perform()
     curl.close()
+    # clear the NaN that pycurl.close() seems to cause the next the next
+    # floating-point operation to return (at least on some platforms).
+    dummy = 1.0/2
     lp_page = callback.contents
     return json.loads(lp_page)