CGFloat CGContextShadowOrientationYMultiplier() {
	static CGFloat sharedMultiplier__ = 0.0;

	if (sharedMultiplier__ == 0.0) {
		NSString *version = [UIDevice currentDevice].systemVersion;
		sharedMultiplier__ = ([version compare:@"3.2"] == NSOrderedAscending) ? 1.0f : -1.0f;
	}

	return sharedMultiplier__;
}