*** -[UIDeviceRGBColor size]: unrecognized selector sent to instance 0x25f110

-[UIDeviceRGBColor开发者_运维问答 size]: unrecognized selector sent to instance 0x31e520
2010-03-18 12:36:48.511 IChitMe[4012:207] Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '** -[UIDeviceRGBColor size]: unrecognized selector sent to instance 0x31e520'

I'm getting this exception when I'm clicking on back button of UIToolBar.

[UIDeviceRGBColor size] selector is NOT defined for the object you are calling it on.