Eh...

http://blog.lostpedia.com/2008/02/carlton-five-more-episodes-of-season-4.html

I guess we're only getting 13 eps this season instead of 16. Supposedly they're splitting the 3 eps among Seasons 5 and 6 to bring the total number of episodes up the original amount they intended. But this is another reason why ABC execs and advertising dollars should not be in control of this show, which is right up there w/ Sopranos and The Shield among the best ever.