The patch isn't a 1-for-1 fix for TDE, but I'll see if I can digest what they did and replicate it in tde gwenview :)
I'm running a fresh full build right now. I massaged the gwenview patch for Trinity. I'm still building against libpng 1.4.9 but at least we'll know whether the patch adversely affects backwards compatibility.
Updated patch:
http://humanreadable.nfshost.com/trinity/patches/tqt-fixes/gwenview-libpng15...
Darrell