Ruby Going Full Throttle On CPU

I'm not sure if this is a Mongrel issue, a rails issue or just a ruby issue, I haven't attempted to dig into it yet. What's going on is a ruby process is going to town on the CPU using between 99% and 101% after I attempt to shutdown mongrel running a rails project using the standard ctrl c. The only way I can get the processes to stop is to kill it.

Has anyone else seen this?

I'm running OS X 10.5

ruby 1.8.6 (2007-06-07 patchlevel 36) [universal-darwin9.0]
mongrel (1.0.1)
rails (1.2.5, 1.2.3)