--- a/PNGReader.st	Fri Jan 17 19:00:28 2020 +0100
+++ b/PNGReader.st	Fri Jan 17 19:00:52 2020 +0100
@@ -730,21 +730,21 @@
     type = 'niVI' ifTrue:[^ self processNIVIChunkLen:len].
     type = 'exEX' ifTrue:[^ self processEXEXChunkLen:len].
 
-    type = 'acTL' ifTrue:[]. "/ animation control
-    type = 'dSIG' ifTrue:[]. "/ signature 
-    type = 'eXIf' ifTrue:[]. "/ EXIF: eXIf 
-    type = 'fRAC' ifTrue:[]. "/ fractal params 
-    type = 'gIFg' ifTrue:[]. "/ GIFGraphicControlExtension 
-    type = 'gIFt' ifTrue:[]. "/ GIFPlainTextExtension 
-    type = 'gIFx' ifTrue:[]. "/ GIFApplicationExtension  
-    type = 'oFFs' ifTrue:[]. "/ ImageOffset  
-    type = 'pCAL' ifTrue:[]. "/ PixelCalibration  
-    type = 'sCAL' ifTrue:[]. "/ SubjectScale  
-    type = 'sPLT' ifTrue:[]. "/ SuggestedPalette  
-    type = 'sTER' ifTrue:[]. "/ StereoImage  
-    type = 'tXMP' ifTrue:[]. "/ XMP obsolete  
-    type = 'vpAg' ifTrue:[]. "/ VirtualPage  
-    type = 'zxIf' ifTrue:[]. "/ EXIF: zxIf  
+"/    type = 'acTL' ifTrue:[]. "/ animation control
+"/    type = 'dSIG' ifTrue:[]. "/ signature 
+"/    type = 'eXIf' ifTrue:[]. "/ EXIF: eXIf 
+"/    type = 'fRAC' ifTrue:[]. "/ fractal params 
+"/    type = 'gIFg' ifTrue:[]. "/ GIFGraphicControlExtension 
+"/    type = 'gIFt' ifTrue:[]. "/ GIFPlainTextExtension 
+"/    type = 'gIFx' ifTrue:[]. "/ GIFApplicationExtension  
+"/    type = 'oFFs' ifTrue:[]. "/ ImageOffset  
+"/    type = 'pCAL' ifTrue:[]. "/ PixelCalibration  
+"/    type = 'sCAL' ifTrue:[]. "/ SubjectScale  
+"/    type = 'sPLT' ifTrue:[]. "/ SuggestedPalette  
+"/    type = 'sTER' ifTrue:[]. "/ StereoImage  
+"/    type = 'tXMP' ifTrue:[]. "/ XMP obsolete  
+"/    type = 'vpAg' ifTrue:[]. "/ VirtualPage  
+"/    type = 'zxIf' ifTrue:[]. "/ EXIF: zxIf  
 
     ('PNGReader: unrecognized chunk: ' , type , ' ignored.') infoPrintCR.