I'll contact Lego for replacements, but wondering if any of you have had this happen. I just bought a new-in-box 10193 Medieval Market Village
. I've noticed some pieces snap together loudly, like they're tight. I got to where I'm putting on the windows 30044
and the first one I did didn't seem to want to go on the studs of the brick below it. I pushed harder and it cracked! I took a spare brick out of the pile (not part of the model yet) and carefully tried to put another window on it. Cracked. A third. I went and got the same window out of a newer classic set, and that one snaps on fine. The old one says "2-02 30044" on the bottom. The newer one says "3-03 30044" and the indentations on the underside are slightly (barely noticeably) different.
There are 17 of these windows. I don't know whether to go ahead and try and put them on so I can tell Lego CS that they all cracked, or just ask for 17 replacements. Even if they go on without cracking, I worry they'll crack in the future. I wonder if Lego CS will balk at sending 17 new ones (unless this is a known problem?)