diff -r df8728f34e85 -r 2d57b3609619 libpurple/value.c
--- a/libpurple/value.c	Thu Jan 01 01:04:34 2009 +0000
+++ b/libpurple/value.c	Thu Jan 01 03:09:10 2009 +0000
@@ -320,6 +320,7 @@
 purple_value_set_string(PurpleValue *value, const char *data)
 {
 	g_return_if_fail(value != NULL);
+	g_return_if_fail(data == NULL || g_utf8_validate(data, -1, NULL));
 
 	g_free(value->data.string_data);
 	value->data.string_data = g_strdup(data);