(I'm not sure if the previous mail was sent otherwise sorry for the multiple posts) Hello, I'm new to MacRuby. I found an unexpected behavior of NSEvent. first of all in Cocoa [NSEvent mouseLocation] would return an NSPoint, with the mouse position. MacRuby NSEvent.mouseLocation return an NSPoint, but without the appropriate values. *irb(main):001:0> framework 'cocoa'* *2010-11-15 13:45:35.880 macruby[669:903] +[NSATSGlyphGenerator initialize] invocation. The class is deprecated.* *=> true* *irb(main):002:0> NSEvent.mouseLocation* *=> #<NSPoint **x=NaN y=NaN**>* * * it does not even work within a mouseUp method, with an NSEvent instance. I tried the same code on an iMac, and it returns the appropriate code, as a CGPoint. so there must be differences between the two. I even got this warning Message NSATSGlyphGenerator on the MacBook, which I dont on the iMac Please help figure out the solution! Thanks Andras Zalavari I'm using Macbook, and MacRuby 7.0... or 7.1? how to check the version of MacRuby t?