Index: app_voicemail.c
===================================================================
--- app_voicemail.c	(revision 431735)
+++ app_voicemail.c	(working copy)
@@ -3334,7 +3334,7 @@
 	if (taglen < 1)
 		return NULL;
 
-	if (!(start = strstr(header, tag)))
+	if (!(start = strcasestr(header, tag)))
 		return NULL;
 
 	/* Since we can be called multiple times we should clear our buffer */