The problem occurs because this change in AcAlphaHints:
Code:
procedure TacCustomHintWindow.ActivateHint(Rect: TRect; const AHint: string);
{$IFNDEF ACHINTS}
var
w, h: integer;
p: TPoint;
{$ENDIF}
begin
{$IFNDEF ACHINTS}
if Assigned(Manager) and HandleAllocated then begin // This is changed
Manager.State := hsInit;