a04c133edc
An interleaved A/B (arms alternating in one series, so cache warming cannot pose as either variable) breaks the confound the last entry flagged — and not in the direction the first table suggested. The LATEST title of every run recorded, 268 s, accepted (A); a 232 s title refused. "The title arrived late" is dead. That leaves --log_ui_draws correlating at 0 of 7 against 4 of 5, with no mechanism available: the cvar is read only when F10 arms a capture, F10 was never pressed in those runs, the per-draw hook is one relaxed atomic load, and the two arms' startup config dumps are byte-identical across 246 settings. A correlation with no mechanism — and an arm that failed once — is not a finding; it is a variable to remove. Removed: F10 now arms the capture unconditionally. Also recorded: three boots this session ended on a permanent black screen, two of them with no input at all. Not the pad, not the cache-flush crash, about one boot in five. Five candidate explanations for the (A) gate are now eliminated or refuted. The next step is the guest's own state machine in sylpheed.db, not another guess from outside.