I just installed 10.1 on my new computer at work. I used the "Update Projects and Events" to import my old files into the system.
My files show up in list view, but there are no thumbnails in filmstrip view in the browser.
When I start up the program, I can see the thumbnails in my "Updated Videos" library, but if I click into any of the other projects, they disappear when I click back into Updated Videos. Again, they are still there when I look at them in list view.
Just as I am typing this I tried to upload some new media and it just causes FCP to crash and quit as soon as I click "import."