Help with thumbnails in CKFinder 2.3

I used CKFinder 2.1 before and havent this problem. Thumbnails view had size 100x100 always. 

$config['Thumbnails'] = Array(
		'url' => $baseUrl . '_thumbs',
		'directory' => $baseDir . '_thumbs',
		'enabled' => true,
		'directAccess' => false,
		'maxWidth' => 350, //100
		'maxHeight' => 350,//100
		'bmpSupported' => false,
		'quality' => 100); //80

Now with my old params Thumbnails became 350x350. What's it and how resolve this problem?

Thanks..