$inellipse is returning wrong value ($true instead of $false) when the 'y' value of the dot tested is between the 'y' value of the circle and the 'y+h' value of that circle, regardless of the 'x' value of the dot tested:
Code:
alias test {
  window -pBCdfo +t @a -1 -1 100 100
  var %x 40,%y 40,%w 20,%h 20,%a 100,%b,%c
  while (%a) {
    %b = 100
    while (%b) {
      %c = $iif($inellipse(%a,%b,%x,%y,%w,%h),64512,255)
      drawdot -r @a %c 1 %a %b
      dec %b
    }
    dec %a
  }
  ;$calc(1+%w) $calc(1+%h) to draw the circle correctly 
  ;instead of being shifted because of the drawrect -e bug
  drawrect -re @a 0 1 %x %y $calc(1+%w) $calc(1+%h)
}
Result: whereas only the dots inside the circle should be green

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