diff -ur libical-0.46-orig/src/python/LibicalWrap.i libical-0.46/src/python/LibicalWrap.i
--- libical-0.46-orig/src/python/LibicalWrap.i	2010-08-31 06:05:04.000000000 +1000
+++ libical-0.46/src/python/LibicalWrap.i	2011-01-09 10:26:13.042939402 +1000
@@ -113,6 +113,9 @@
 %ignore icalcomponent_get_span(icalcomponent* comp);
 %ignore icalproperty_remove_parameter(icalproperty* prop, icalparameter_kind kind);
 
+// Can't wrap va_list
+%ignore icalproperty_add_parameters(struct icalproperty_impl *prop, va_list args);
+
 #ifndef _DLOPEN_TEST
 %ignore icalset_register_class(icalset *set);
 #endif