I downloaded v80 of Safari and installed it, but it had a weird font problem so I decided to go back to v74 (or whatever the last public release was). I went to Apple's site and downloaded it, and put it in my Applications folder, replacing v80. But now when I try to use it, the browser windows don't appear - I just get a menu bar. If I go to the Window menu I can see the windows, and if I select them then they appear, but I can't visit any sites (no error, just doesn't do anything). I thought maybe some new settings from v80 are confusing it, so I looked around for Safari preferences and deleted everything I could find. Same problem. So I decided to but v80 back on, since it's better than nothing. But when I try to install it, I get the message "You cannot install this software on this disk. This system cannot use this software". So now I'm stuck in IE until I get it fixed Any ideas?