Index: Zend/zend_API.c
===================================================================
RCS file: /repository/ZendEngine2/zend_API.c,v
retrieving revision 1.296.2.27.2.34.2.52
diff -u -p -r1.296.2.27.2.34.2.52 zend_API.c
--- Zend/zend_API.c	14 Aug 2008 21:36:56 -0000	1.296.2.27.2.34.2.52
+++ Zend/zend_API.c	22 Aug 2008 14:45:37 -0000
@@ -1920,9 +1920,13 @@ ZEND_API int zend_register_functions(zen
 			efree(lc_class_name);
 		}
 		while (ptr->fname) {
-			if (zend_hash_exists(target_function_table, ptr->fname, strlen(ptr->fname)+1)) {
+			fname_len = strlen(ptr->fname);
+			lowercase_name = zend_str_tolower_dup(ptr->fname, fname_len);
+			if (zend_hash_exists(target_function_table, lowercase_name, fname_len+1)) {
+				efree(lowercase_name);
 				zend_error(error_type, "Function registration failed - duplicate name - %s%s%s", scope ? scope->name : "", scope ? "::" : "", ptr->fname);
 			}
+			efree(lowercase_name);
 			ptr++;
 		}
 		zend_unregister_functions(functions, count, target_function_table TSRMLS_CC);