Problem with permitted_uri_chars and Cyrilic letters

[eluser]hugle[/eluser]
Hello everyone,

the default value of permitted_uri_chars is:

Code:

$config['permitted_uri_chars'] = 'a-z 0-9~%.:_\-';

but since I needed to add Russian language support, I decided to change it to:

Code:

$config['permitted_uri_chars'] = 'a-z а-я 0-9~%.:_\-';

then I noticed, that sometimes I still get errors like 'The URI you submitted has disallowed characters.'

so I thought maybe I need to add UPPER case support, so changed it to:

Code:

$config['permitted_uri_chars'] = 'a-z а-я А-Я 0-9~%.:_\-';

again, the same, sometimes I was getting the errors : 'The URI you submitted has disallowed characters.'

Later, I didn't know that to do, co decided to go threw all alphabet, you can see it here:

Code:

А а  Б б  В в  Г г  Д д  Е е  Ё ё Ж ж  З з  И и  Й й  К к  Л л  М м Н н  О о  П п  Р р  С с  Т т  У у Ф ф  Х х  Ц ц  Ч ч  Ш ш  Щ щ  Ъ ъ Ы ы  Ь ь  Э э  Ю ю  Я я

And I decided to check letter/by latter, if error appears, and yes, there were many 'The URI you submitted has disallowed characters.' errors.... but after checking al the letters, I came to final sollution:

Code:

$config['permitted_uri_chars'] = 'a-z ртхцчшщъыэюьЁуф а-я А-Я 0-9~%.:_\-';

where could be a problem? Is it the problem with CI, PHP? or whatever else...?

thank you very much, CI version is 1.7.1

cheers,
Jaroslav