I'm having some trouble getting this to work. After I installed it and restarted sketchup, the new toolbar didn't show up. I went in the ruby console to load it manually, and got the following error:

Error: #<SyntaxError: (eval):27:in `load': /Library/Application Support/Google SketchUp 8/SketchUp/Plugins/OSCoolean.rbs:1: no .<digit> floating literal anymore; put 0 before dot
RBS1.0
^
/Library/Application Support/Google SketchUp 8/SketchUp/Plugins/OSCoolean.rbs:1: parse error, unexpected tINTEGER
RBS1.0
^>
(eval):27
(eval):27