Хостер уменьшил выделенные ресурсы, якобы из-за периодических перегрузок.

На вопрос о проблемах прислал следующее:
I advise you to check error log and resolve the issue:
[07-Apr-2013 08:00:05 America/Chicago] PHP Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent in /home/myrealsite/public_html/includes/bootstrap.inc on line 1165
[07-Apr-2013 08:00:05 America/Chicago] PHP Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/myrealsite/public_html/includes/bootstrap.inc:1165) in /home/myrealsite/public_html/includes/bootstrap.inc on line 1165