Warning: global queued usermessages!

The problem manifests itself in the Windows Server 2003/2012 or on Ubuntu 13.04 x64
DarkRP the latest version!
This problem can not be related to the addons!
On hosting such a problem did not appear!

Dedicated server specs:

CPU: 4x5000Mhz Xeon
RAM: 8192 Mb.
Hdd: 100 Gb.
Net: 100 Mbit/s