e.g. preferences -> Editing -> columns has a maximum value of "1000" and should have a maxlength="4" since any value over 1000 will cause an error. While this still does not solve for any 4 digit number greater than 1000 being entered and causing an error it will give users an idea about the scale of the number needing to be input.
instances in prefs where this issue is present:
Editing -> columns | maxlength="4"
Editing -> rows | maxlength="4"
Recent changes ->Days to show in recent changes | maxlength="2"
watchlist -> Days to show in watchlist: | maxlength="2"