works fine for me, is it every building or a specific building?? have you tried clearing the cache??
the devs need a little more info from you to helpspeed your query along so if you could please- ingame click the settings button(beside the fullscreen button bottom left) from here goto about tab and finally click copy to clipboard and then paste it in here. it should end up something like this
0.17.9708 (13.09.2012 16:51), Farmerlynch (4730), zz1, en_US, WIN 11,3,31,232, Windows Vista, Chrome/21.0.1180.89, 1366x653