Index: nevow/test/test_json.py
===================================================================
--- nevow/test/test_json.py	(revision 1820)
+++ nevow/test/test_json.py	(working copy)
@@ -11,6 +11,7 @@
     True,
     False,
     u'string',
+    u'string with "embedded" quotes',
     [],
     [0],
     [0, 1, 2],
Index: nevow/json.py
===================================================================
--- nevow/json.py	(revision 1820)
+++ nevow/json.py	(working copy)
@@ -39,7 +39,7 @@
 closeBrace = re.compile(r'}')
 openSquare = re.compile(r'\[')
 closeSquare = re.compile(r'\]')
-string = re.compile(r'"([^"]+|\\")*"')
+string = re.compile(r'(?<!\\)"([^"]+|\\")*(?<!\\)"')
 identifier = re.compile(r'[A-Za-z_][A-Za-z_0-9]*')
 colon = re.compile(r':')
 comma = re.compile(r',')