Seems I've found a way to fix this.
diff --git a/Lib/code.py b/Lib/code.py
index e01051e..9b40ed9 100644
--- a/Lib/code.py
+++ b/Lib/code.py
@@ -1,5 +1,3 @@
-# XXX This is broken with class exceptions
-
 """Utilities dealing with code objects."""
 
 def compile_command(source, filename="<input>", symbol="single"):
@@ -50,7 +48,15 @@
 
     if code:
 	return code
-    if not code1 and err1 == err2:
+    try:
+	e1 = err1.__dict__
+    except AttributeError:
+	e1 = err1
+    try:
+	e2 = err2.__dict__
+    except AttributeError:
+	e2 = err2
+    if not code1 and e1 == e2:
 	raise SyntaxError, err1