John Paines wrote: At one point I think "s" toggled between slip/slide but, if so, no longer.
I really can't see this with either the default or custom hotkeys. S (or whatever hotkey you assign to Trim > Toggle Slip/Slide Mode menu) should still work. Further, this hotkey can be explicitly overridden in the keyboard module and it still works.
Could I know more about your keyboard assignment? If it is a preset, the name of the preset... and if custom-configured, a copy of your keyboard assignments exported, and some info on how and when it was created/imported etc.