So I installed the update last night and since then I am not able to log in ti my MacBoook at all.

When I enter my password it goes to log in then flashes back to the log in screen and just keeps asking me to enter my password.

Has anyone had this happen to them as well?

I used the OS X dvd to run Disc Utility and repair and verify permissions.

All is ok.

I still cant log in.

I phoned apple ( I live in Australia ) they were useless and offered no help, only but to try and get to to pay to be supported for an issue that was caused from their end.

Till last night my MacBook was perfect.

Any help would be great.