After installing CFBuilder beta 2 in standalone mode I noticed that after a period of time the WindowServer service was eating up my CPU.
After a quick mention on twitter I found out @sebduggan was also having the same issue.
For anyone else getting this @sebduggan has posted a bug to the Adobe ColdFusion Bug Tracker (ID: 80249)
For the record I have gotten around the issue by installing CFBuilder as a Pluggin to a fresh copy of Eclipse