eZ Publish has a problem while searching for a word containing a special character, e.g. with a german umlaut. The user gets a fatal error: database transaction error.

The problem occures in the PHP-function "strtolower". Please see:
http://www.sitepoint.com/blogs/2006/08/10/hot-php-utf-8-tips/

In order to fix the problem without replacing all strtolower functions (mb_strtolower) the setlocale function with parameter LC_CTYPE, 'C' will help.

We added the setlocale function in index.php.

Steps to reproduce

We searched a second time with a word with german umlaut. With this search we get the transaction error and the message:

Query error: Duplicate entry 'seifenk' for key 2. Query: INSERT INTO
ezsearch_search_phrase ( phrase, phrase_count, result_count )
VALUES ( 'seifenk��rbchen', 1, 0 )