While I've never seen an update cripple our software. I have noticed changes in rendering engines that change how things appear slightly. Minor stuff, only a fe

While I've never seen an update cripple our software. I have noticed changes in rendering engines that change how things appear slightly. Minor stuff, only a few pixels here and there. Also, I was forced to change our browser checking software to only do lower bound checking. Before, I would explicitly specify which versions were allowed. Now it's more like Firefox 4+, etc.