This has fixed itself. I don't know how or why. But after installing 10.9.2 and rebooting the tiff files with varying alpha values look the same as png files. I don't think it was the update to 10.9.2 but I've got no proof, but instead I think it is related to the fact that I've occasionally had problems with graphics after the automatic switching of using the discrete and integrated graphic cards has occurred. This happens when I'm switching between using my laptop plugged into an external monitor, or when using the laptop without the external display but switching between running the laptop plugged into the power supply and not.
Whatever the reason I can no longer investigate because it currently works. Kevin _______________________________________________ Cocoa-dev mailing list ([email protected]) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
