This will take a bug report to coordinate information regarding the change and fixes needed by all the various code. I'll get one started and list it as major. You and Tim can elevate it to BLOCKER if you determine that's what it needs to be. I'll start listing applications affected when I find them.
Done:
NetBSD may have patched this, but I can't find the actual patch file, just references to same ("Add media-gfx/gwenview-1.4.2 with libpng 1.5 buildfix (NetBSD patch); Fix media -gfx/digikam-0.9.6 to build with libpng 1.5 (NetBSD patch)") and some incomplete chunks from a now-deceased website.
Yes, this is becoming strange. I spent the past half-hour unsuccessfully looking for patches.
How deep does this affect Trinity? All the way to building (T)Qt3 too?
Darrell