Mountain Lion Problems

[roozter]

I have the same issues.

Login screen is blank; not showing login pictures or password entry box. My workaround for this is to hit the right arrow twice (there are only two user logins displayed) then enter then type my password. I am choosing to live with the issues (so far) and keep my third display rather than uninstall the driver and lose my third display.

Other issues you are probably having are:
Finder crashes - Yes
Flash crashes - Yes
Login issues - Yes, see above
Preview crashes - Yes
Shockwave crashes
Java, Shockwave and flash will not install. Image mounts but will not trigger the installation.

Attempted workaround: Reboot in "safe mode" and install flash, java and shockwave. This was successful but reboot into normal mode shows that the installtion did not take. I still receive messages about missing plug-ins.