After upgrading to Mountain Lion last night, Safari will not launch on my MBP. It simply stops and is unable to load it's first page. I have not had this problem on my iMac, Safari works fine therre. I uninstalled all extensions and it still will not launch. The progress bar simply freezes - but I am able to quit, try and reload, etc. (all buttons work).
I have uninstalled all extensions and still the problem remains.