Two iterations ago I filed title's 790-pixel gap with sylpheed-cli as needing the
Decoder's element list. That was a hypothesis dressed as a question and it is
refuted: the pixels sit at ptlogo_back2eff1 (pos 938,194) and BOTH renderers draw
it -- mean 95.60 against 95.08. A set difference would have confirmed nothing at
someone else's cost.
Also ruled out: a placement offset. Every +/-1 px roll is two orders of magnitude
worse (790 against >=175406).
The mechanism stays unknown and I am not guessing. My antialiasing test failed
its own control -- the edge mask covered 92% of the frame, so the 25.2% of
differing pixels on it is below chance.
Ask withdrawn rather than left standing: a row on a refuted premise is worse than
no row. The residual is 0.086% of one frame between two of our own renderers, on
a screen matching the oracle at 0.21%.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N7FiFFFwbvG2uxdcEh8HyF
68b543e1a2