Ok, The long bug list continues :
Currently sculpting like usual on a regular mesh (no dynamesh involved here) and in the middle of my sculpting I receive a window popup “unable to record brush strokes” every single time I move or do a mouse action…
this has happened to me as well 2 diffrent times, relaunching the software fixed it but I had never seen this before 4R2
You may have pressed the ‘3’ key which activates the stroke-recorder.
This allows you to record and replay multiple strokes. Press ‘3’ again to turn it off.
If you are not using this function, then reassign a different hotkey to it so you do not accidentally re-activate it.