A warning when fetching exif data

Hello.

I have a warning when an image is resized:
Warning: exif_read_data(image.png) [function.exif-read-data]: File not supported in /path/to/wp-content/plugins/imsanity/libs/utils.php on line 60

exif_read_data() works only on jpeg and tiff files.
Maybe you should take a look at wp_read_image_metadata() and the way it handles exif_read_data().

list( , , $sourceImageType ) = getimagesize( $file );
if ( is_callable( 'exif_read_data' ) && in_array( $sourceImageType, apply_filters( 'wp_read_image_metadata_types', array( IMAGETYPE_JPEG, IMAGETYPE_TIFF_II, IMAGETYPE_TIFF_MM ) ) ) ) {
	$exif = @exif_read_data( $file );
	$orientation = is_array( $exif ) && array_key_exists( 'Orientation', $exif ) ? $exif['Orientation'] : 0;

https://ww.wp.xz.cn/plugins/imsanity/