Hi!
I installed sage 6.4.1 and launched sage notebook.
I press shift-enter and get new line.
I press enter and get new line too....
Also I found that sage notebook doesn't save my input.
Then I saw in terminal and found there are many problems.
It seems for me Flask doen't work.
I didn't have any problems during installing sage.
I attached log to my message.
Please help me.
Andrei.