I'm also having a problem with Safari. I am running OS X 10.8.4 and the system locks up if I try to start Safari. The only thing that I can think of is that i've some problem with a popup ad that doesn't want to go away so that I have benn using Force Quit when the ad appears. The system says that Safari 6.0.5 is loaded.
<Edited by Host>
See if you can do this before you have to force quit ...
From the Safari menu bar click Safari > Preferences then select the Extensions tab. Turn that OFF, quit and relaunch Safari to test.
If that didn't help, select the Security tab from the Preferences window then deselect: Allow all other plug-Ins
Quit and relaunch Safari. If the pop ad does not appear, then you need to troubleshoot plugins.
Help here > Safari: Unsupported third-party add-ons may cause Safari to unexpectedly quit or have performance issues
The GeniusBar resolved the problem by deleting everything in Library/Caches in the user directory. Please note that this also deleted the user options for the dock.
Re: Safari 6.0.5 on OS 10.8.4 doesn't work anymore.
