trynig toLowerCase the following word "ŞİŞLİ" on mongo shell

at the version 2.2.3 this function work properly for turkish people.

"ŞİŞLİ".toLowerCase() is "şişli"

but with version 2.4.1 wi get double dot on "ı".
telman@telman:~$ mongo --version
MongoDB shell version: 2.4.1
telman@telman:~$ mongo uysdb
MongoDB shell version: 2.4.1
connecting to: uysdb
> "ŞİŞLİ".toLowerCase()
şi̇şli̇ //the exact "i" char here have double dot instead of one.
>

I guess you tried to make a support for "İ" char. but the function is wrong

currently I handle this state as below.

this is what the turkish people expected.

the proble is : we have to different character regradin to engli i.

1) I and 2) İ and each lower case of that charcter is just the small version
1) ı and 2) i

breafly it have to be Iı and İi

String.prototype.toTurkishLowerCase = function(){
str = this.replace(/I/g,"ı").replace(/İ/g,"i");//otherwise it
return str.toLowerCase()
};

Thanks for you efforts.

best regards
telman