I've noticed hires (like Frogo, etc.) don't pop the new ? ! overhead symbols. I know some people don't like them (and an option toggle would be nice for that); but for consitancy's sake (and for alerting the entire party), is it possible to have hires show them too when they sense traps/secret doors?
edit: Appears to just be traps that don't give the symbol, secret doors seem to work.