This one's a minor problem, but just in case you run into it, here it is. I modified my network settings with *censored*tail, to those prescribed for FIOS. After installing 10.4.10, my browsers wouldn't work. I don't have the exact text on me, but a message in Safari implied a buffer overflow. I went back to *censored*tail, reinstated the original settings and that took care of the problem. I set them back to FIOS, and it's working just fine. Just a heads up.