Fix me...

index.html

@@ -107,8 +107,7 @@
                 // Auto sized images
                 {
                     src: 'https://farm4.staticflickr.com/3920/15008465772_d50c8f0531_h.jpg',
-                    autoSize: true,
-                    title: 'Example caption. Image height and width defined via "autoSize: true"'
+                    autoSize: true
                 },
                 {
                     src: 'https://farm6.staticflickr.com/5591/15008867125_b61960af01_h.jpg',

src/js/gestures.js

@@ -984,6 +984,7 @@ var _gestureStartTime,
 		);
 
 		if (itemChanged) {
+			self.ui.resetCaption();
 			self.updateCurrItem(true);
 		}
 

src/js/ui/photoswipe-ui-default.js

@@ -59,14 +59,14 @@
 
 					// If allowLongCaptions is true, position caption just under picture and show "Expand" button if necessary
 					if (_options.allowLongCaptions) {
-						var imagePositionTop = item.initialPosition.y;
-						var apparentImageHeight = Math.round(item.h * item.initialZoomLevel);
+						var imagePositionTop = 0;
+						var apparentImageHeight = 1024;
 						var gapTop = item.vGap.top;
 
 						ui.resetCaption();
 						var naturalCaptionHeight = innerCaptionElement.clientHeight;
 
-						var captionCtrl = captionElement.querySelector('.pswp__button--caption--ctrl');
+						var captionCtrl = document.querySelector('.pswp__button--caption--ctrl');
 
 						_setLayoutData(captionElement, imagePositionTop, apparentImageHeight, gapTop, naturalCaptionHeight);
 						var layoutData = _getLayoutData(captionElement);