Comment 1 for bug 1315458

That indicates that something on your install is broken. Applications
launched from the dash do not have a functioning stdout/stderr stream.
calibre assumes it can write to both stdout and stderr by default.

1) Find the calibre.desktop file somewhere on your computer and add
> /dev/null 2> /dev/null to the launch command (this redirects stdout
> and stderr to null, which will workaround the problem).

2) Find and fix the problem with yoruy Ubuntu install, for that you will
neeed to ask for help in the ubuntu fora.

 status invalid