Yii在提交表单后编码整页丢失格式编码

I have a website with some form (2-step registration) and after I submit the form with some errors (i.e. missing password or too short username) the page reload and "lost" information about encoding so the page looks very bad:

enter image description here link to the website where this form is: http://portalpracy24.pl/pracodawca/zarejestruj

Can't find the problem where is, charset=utf-8 is present all the time :/ Anyone can help?

This problem is only in Firefox :)

Ok found the problem,

Just addedd 2 line to htaccess and works great:

AddDefaultCharset UTF-8 AddCharset UTF-8 .php