Description:
------------
we have a probleme on production server with php 5.2.6
And the server administrator want to update on the 5.2.8 only if this bug is resolve in this version.

Sometimes, substr don't work and sometimes it does

The bug come only when there ist a specialchar like é or è.

we work in iso.

it is a production server with many client, so the administrator will not use the cvs version.

Thanks

Reproduce code:
---------------
<?php
echo htmlentities(substr(html_entity_decode("&eacute;abcde"),0,3))."<br>";
?>

Expected result:
----------------
éab

Actual result:
--------------
sometimes : éab

sometimes : éabcde