issue with february 28th about rrule HOT 2 CLOSED

 new RRule({
  freq: RRule.WEEKLY,
  dtstart: new Date(2013, 0, 1, 0, 0, 0),
  count: 3,
  bymonthday: [28]
}).all()[1].getMonth()
2 // March - incorrect

new RRule({
  freq: RRule.WEEKLY,
  dtstart: new Date(2013, 0, 1, 0, 0, 0),
  count: 3,
  bymonthday: [29]
}).all()[1].getMonth()
1  // February - correct