I read the reviews, but still decided to try it ... worst case is I back it out and put previous version in. Well everything seem to go alright with the install, but after fixing permissions, rebooting and emptying Safari cache I tried my first website. 10 secs to make Safari blowout and some sites just going to them made Safari quit. I am now safely back with version 7 and having no problems. I think it best to wait for a non-beta.