still available as "autolevels_skew".
https://rt.cpan.org/Ticket/Display.html?id=94413
+ - Imager::File::PNG now supports libpng 1.6.10.
+ 1.6.10 changed CRC errors from benign errors to normal errors,
+ which broke the test which used CRC errors to check for benign
+ error support. Switched to using a 1-bit grey-scale image with a
+ palette to test for benign errors.
+ https://rt.cpan.org/Ticket/Display.html?id=94717
+
Imager 0.98 - 3 Jan 2014
===========
+Imager-File-PNG 0.90
+====================
+
+ - support libpng 1.6.10.
+ 1.6.10 changed CRC errors from benign errors to normal errors,
+ which broke the test which used CRC errors to check for benign
+ error support. Switched to using a 1-bit grey-scale image with a
+ palette to test for benign errors.
+ https://rt.cpan.org/Ticket/Display.html?id=94717
+
Imager-File-PNG 0.89
====================