Apache giving abnormal 302 instead of normal page?

Question

linux

Confused.
There was a site usbflash.ru/ - it worked fine for itself. Now I began to issue 302. Location on itself (which leads to a 310 error in the browser).
In the logs, apache issues 302.
At the same time, www.usbflash.ru/ works fine.
Config:
<VirtualHost *:80>
ServerAdmin [email protected]
ServerName usbflash.zcn.ru
ServerAlias ​​usbflash.ru
ServerAlias ​​www.usbflash.ru
DocumentRoot /var/www/usbflash.ru/
ErrorLog /var/log/apache2/error. log
.htaccess file is missing.
I tried to turn off this VirtualHost - the result is the same 302, only www.usbflash.ru starts pointing to the default stub.
What tools can you see and understand what is happening?

Answer 1

Everything is working?

Answer 2

The X-Powered-By:PHP/5.3.2-1ubuntu4.13 header in the response hints that the redirect is done using php.