Ticket #49601: 49601.diff

src/wp-includes/media.php

@@ -1786 +1786 @@
         $style = '';
 
         if ( $caption_width ) {
-                $style = 'style="width: ' . (int) $caption_width . 'px" ';
+                $style = 'style="max-width: ' . (int) $caption_width . 'px" ';
         }
 
         if ( $html5 ) {