We noted yesterday that the new Snow Leopard Update Breaks Rosetta and that a group of high-schoolers had released a third-party fix. Fortunately, the wizards of Cupertino have either corrected this problem themselves or used the third-party fix—either way, the newest version of that update (Security Update 2012-001 v1.1) is now available on Apple's site or using the Software update function.
Apparently the patch to the ImageIO code was the cause of the break. Further detail can be found at the source link below. Photo by Macpedia