Character encoding issue in Uri.php filterQuery() method.

[oroszlanyzsolt]

In example when the query string contains something like this: "?name=value&név=érték" in internet explorer the browser does not send it as utf-8 encoded, the result is "?name=value&n?v=?rt?k".
It is a known bug in Internet Explorer browsers.
Possible workaround is checking return value of filterQueryOrFragment() for null value (because filterQueryOrFragment() returns null on failure) and call filterQueryOrFragment() again but the input have to run through utf8_encode() function. All together: filterQueryOrFragment(utf8_encode(<query_string_here>)).
As far as I know other browsers are not affected by this bug, e.g.: Mozilla Firefox, Google Chrome, Opera browser (current versions).