CS 6.0 W7 64 - Crashes today in first attempts to use it.

While attempting to work with multiple sequences, (I was creating a new sequence in a project), I got a debug error "Premiere Pro has encountered an error." ....SrcSequenceTrackitem.cpp-1891".

The program then terminated, with a message
"Sorry, a serious error has occurred that requires Adobe Premiere Pro to shut down. We will attempt to save your current project."

It is now in a spinning ball of death, for the last 20 minutes, attempting to save the project.

This is the third crash today, of my first project with CS6. In 5.5 I never experienced a crash. This is quite disturbing...Oh well. It seems that I'm heading back to 5.5 until further notice.

Al