To correct errors on the website yii (1)

If you are migrating sites
vkusno.milimon.ru
milimon.ru
from one host to another started to experience the error:

1. Some directories: /menu/* crashes 404. Happens spontaneously. Sometimes it worked, sometimes not.
2. In the basket, again, some, not fire button to place your order
3. When you register the code that comes in the mail is not suitable. There was one case.

All bugs spontaneous. Someone works, someone no.

Most likely the problem is with htaccess