Index: wp-admin/includes/image.php
===================================================================
--- wp-admin/includes/image.php	(revision 17446)
+++ wp-admin/includes/image.php	(working copy)
@@ -296,8 +296,8 @@
 			$meta['created_timestamp'] = wp_exif_date2ts($exif['DateTimeDigitized'] );
 		if ( ! empty($exif['FocalLength'] ) )
 			$meta['focal_length'] = wp_exif_frac2dec( $exif['FocalLength'] );
-		if ( ! empty($exif['ISOSpeedRatings'] ) )
-			$meta['iso'] = utf8_encode( trim( $exif['ISOSpeedRatings'] ) );
+		if ( ! empty($exif['ISOSpeedRatings'] ) ) 
+			$meta['iso'] = is_array( $exif['ISOSpeedRatings'] ) ? utf8_encode( implode( ',', $exif['ISOSpeedRatings'] ) ) : utf8_encode( trim( $exif['ISOSpeedRatings'] ) );
 		if ( ! empty($exif['ExposureTime'] ) )
 			$meta['shutter_speed'] = wp_exif_frac2dec( $exif['ExposureTime'] );
 	}