OSX double clicking on window throws exception

[DavidKarlas]

In Yosemite new action was added to windows... Double clicking resizes it to full screen. Doing so on JabbReto client throws following exception:

An unexpected error has occurred. Please report this to [email protected]

Details: System.ArgumentNullException: Argument cannot be null.
Parameter name: sender
at MonoMac.AppKit.NSWindow.Zoom (MonoMac.Foundation.NSObject) <0x0009b>
at Eto.Platform.Mac.Forms.MyWindow.Zoom (MonoMac.Foundation.NSObject) <0x000a7>
at (wrapper dynamic-method) object.Eto.Platform.Mac.Forms.MyWindow.Void Zoom(MonoMac.Foundation.NSObject) <0x00033>
at (wrapper native-to-managed) object.Eto.Platform.Mac.Forms.MyWindow.Void Zoom(MonoMac.Foundation.NSObject) <0x0011b>
at (wrapper managed-to-native) MonoMac.AppKit.NSApplication.NSApplicationMain (int,string[]) <0x00003>
at MonoMac.AppKit.NSApplication.Main (string[]) <0x00097>
at Eto.Platform.Mac.Forms.ApplicationHandler.Run (string[]) <0x0008b>
at Eto.Forms.Application.Run (string[]) <0x0001c>
at JabbR.Eto.Mac.MainClass.Main (string[]) <0x002b2>