message: Use a small fractional value instead
diff: @@ -156,12 +156,14 @@ export default class ReadReceiptMarker extends React.PureComponent {
  // then shift to the rightmost column,
  // and then it will drop down to its resting position
  //
  - // XXX: We use a `left: 1px` to trick velocity-animate into actually animating. This
  - // is a very annoying bug where if it thinks there's no change to `left` then it'll
  + // XXX: We use a fractional left value to trick velocity-animate into actually animating.
  + // This is a very annoying bug where if it thinks there's no change to `left` then it'll
  // skip applying it, thus making our read receipt at +14px instead of +0px like it
  - // should be. This does cause 1px of drift for read receipts, however nobody should
  - // notice this while it's also falling.
  - startStyles.push({ top: startTopOffset+'px', left: '1px' });
  + // should be. This does cause a tiny amount of drift for read receipts, however with a
  + // value so small it's not perceived by a user.
  + // Note: Any smaller values (or trying to interchange units) might cause read receipts to
  + // fail to fall down or cause gaps.
  + startStyles.push({ top: startTopOffset+'px', left: '0.001px' });
  enterTransitionOpts.push({
  duration: bounce ? Math.min(Math.log(Math.abs(startTopOffset)) * 200, 3000) : 300,
  easing: bounce ? 'easeOutBounce' : 'easeOutCubic',
  