--- a/layout/generic/nsFlexContainerFrame.cpp
+++ b/layout/generic/nsFlexContainerFrame.cpp
@@ -2206,19 +2206,18 @@ nsFlexContainerFrame::Reflow(nsPresConte
           // If this item's height is stretched, it's a relative height.
           curItem.Frame()->AddStateBits(NS_FRAME_CONTAINS_RELATIVE_HEIGHT);
           childReflowState.SetComputedHeight(curItem.GetCrossSize());
         }
       }
 
       // XXXdholbert Might need to actually set the correct margins in the
       // reflow state at some point, so that they can be saved on the frame for
-      // UsedMarginPropeorty().  Maybe doesn't matter though...?
+      // UsedMarginProperty().  Maybe doesn't matter though...?
 
-      // XXXdholbert Assuming horizontal
       nscoord mainPosn = curItem.GetMainPosition();
       nscoord crossPosn = curItem.GetCrossPosition();
       if (!AxisGrowsInPositiveDirection(axisTracker.GetMainAxis())) {
         mainPosn = frameMainSize - mainPosn;
       }
       if (!AxisGrowsInPositiveDirection(axisTracker.GetCrossAxis())) {
         crossPosn = frameCrossSize - crossPosn;
       }