[Plugin: Regenerate Thumbnails] Images won't crop

Hello,

It seems after updating my blog to WP 3.1 or WP3.2-bleeding my images won’t get cropped anymore to the correct size.
The width and height parameters are getting adjusted though, so it ‘looks’ sort of OK.
It however does load the larger images.

I’m currently using the following code:
add_image_size( 'page-thumbnail', 210, 210, true );

if ( has_post_thumbnail() ) {
		the_post_thumbnail( 'page-thumbnail' );
	}

Best regards,

Cor