From https://github.com/Juanvvc/c172p-detailed/ release/2016.1 commit 3f33b88bb015a8ee685ab3178932d16d6e072410 A big Thank-You to the c172p-detailed team for their ongoing work.
The files were identified using the pngcrush software and repaired by stripping out the PNG header including the ICC profile using the command: $ pngcrush -fix -force old.png new.png; mv -f new.png old.png Each file was manually checked in an image viewer to look for any corruptions. This follows from the threads http://thread.gmane.org/gmane.games.flightgear.devel/79895 and http://thread.gmane.org/gmane.games.flightgear.devel/79898 .
From https://github.com/Juanvvc/c172p-detailed.git Commit df6b2c5f4f75d000c5f5ef9c6cc4446784348f20
