Hi guys... Here's a Sesame Street News Flash!
As Drtooth said, the next new episode from Season 41 will indeed air out of order. According to Muppet Wiki, the episode in question—Episode 4226: Where's Itsy Bitsy?—will air on October 29, 2010. Unfortunately, this means I'll probably miss out on the rest of the season due to stinkin' Daylight Savings Time ending for this year. Also, Episode 4226 is another nature clues episode where Elmo and Telly and Rosita search for Itsy Bitsy Spider, only to keep getting hints from other insects. Episodes 4223, 4224, and 4225 will air during the first week of November from the 1st to the 5th on every other day as is customary for Sesame Street airings.
Additionally... You know those Season 39 episodes they've been airing but with slight formating differences to when they originally aired two years ago? Well, those formatted Season 39 episodes are being claimed as Season 41 episodes, starting from 4239 to 4256 listed after Episode 4238 at Muppet Wiki's article for the new season.
Hope this helps and enjoy the rest of the new episodes.