[Silvers]

This is caused by overflowing the clients console buffer. I would suggest halfing the number of plugins, testing, and halfing again or restoring half etc until you can pin point the pluging causing it. If it happens regularly then you can solve the issue quickly. If it started happening recently look at what you changed or added, unless this is some malicious exploit caused by a 3rd party, maybe someone whos playing on the server at the time, maybe not connected at all.