This upgrade has been unbelievably slow for me with "not responding" cues on Force Quit Applications; my whole system literally grinds to a halt. Typing is virtually never in real time and frankly, I don't have the time to wait for the delays involved in watching my print come up "eventually". This never happens with Safari (which, in general, I like much less than Camino).
In addition, this build seems to have some compatiblitity issues with AOL (yeah, shoot me--I still use them); new mail no longer shows in the mail box without refreshing the page, and trying to open a different mailbox sometimes results in nothing but a refresh of the page I'm on. I need to be able to utilize multiple tabs and windows without my system wheezing as though it's in the throes of an asthma attack, so I'm going to have to trash this version.