OCTGN

Ended up in a situation where another client had joined my server and said that he was seeing the “Two-sided table” repeatedly being checked and unchecked. The server window had become completely unresponsive and the CPU was pegged near 100%.

Here was the sequence of events:
Was watching a flash video (which caused initial high CPU usage)
Started server
Just before the other client joined, clicked on “Two-sided table” and nothing happened. Proceeded to click on it two or three more times.
Switched windows to pause video to lower CPU usage (other client joins around here).
Server window is locked up and not responding with 100% usage.
Other client leaves server, DoS condition ends.