My notebook interface doesn't work
I have a problem when I try to use sage with the notebook interface on my mac (a macbook pro under MacOS 10.7). When I launch a notebook interface, sage doesn't work. If I type 2+2 and click "evaluate", nothing happens. However, what is weird is that if I close the window and reopen it, then the answer is here "4".
Also, when I launch sage in a terminal instead, things work quite normally.
I have no idea of what is happening here. It used to work normally, until about two months ago. Since then I have tried everything I could think of, without success: quitting sage and relaunching it, killing all processes related to sage, restarting the computer, changing the browser (from safari to mozilla), reloading a new version of sage from the internet...
If anyone has any idea of what is happening and what I should try, thank you