Hi!
Playing with the nodes compositor, I have noticed a weird behaviour of the Time Input node.
When you insert a new key (dot) on the curve, using I Key and typing a value in the field instead of clicking with the mouse button, the dots are not on the curve,and the curve is not edited.
If you want the new dots to be included in the curve (refresh), it is necessary to move one of the dots that are already on the curve.
As the values of the dot can’t be edited once they are created, this means that when you move a dot, you can’t place it again at the exact same value,and so you loose the accuracy of the values previously set using the field value.
The curve actually is edited and the dot is on the curve, but at X position 0 (the value you enter is the Y value). If you grab that dot and move your mouse to the right (a droit en francais?) you will see the curve flip around to honor the new dot. Continue dragging.
Yes, not being able to edit, a la the RGB Curve node widgets, is sad. You should enter a bug report for that to ask that all curve displays use the same widget.