Over the past few days on CF Talk Ian Skinner has been struggling tuning an application that makes use of CFTHREAD. In his application a process spawns threads for creating report files. Ian Reports that the process would spawn the threads, but the threads themselves would neither complete gracefully nor respond to a "terminate" action (<cfthread action="terminate" ...>). No suggestions from the muse or anyone else seemed to help. Finally he upgraded to ColdFusion 8.0.1 and the problem appears to be resolved. Threads complete gracefully without hanging around.
Nothing in the 8.0.1 release notes raises any red flags with me that would indicate why updated to 8.0.1 resolved the issue. I suspect that something very specific about his JVM was causing it. Still, it's nice to know if you run into this ticklish issue there is a way around it.