Hi!
Calibre is just a great piece of software.
Since I updated it from 0.4.125 to 0.4.141 I've got a little problem.
When I strike the shortcut "v" (or choose show pdf in the menu) I used to see the external program starting and viewing the pdf. Nowadays nothing happens.
Viewing pdf with the internal viewer is no problem, also viewing pdfs by doubleclicking outside of calibre. Reinstalling calibre as well as okular (the viewer on my linux-system) didn't help.
Any ideas? Where can I get more information? There's nothing in the log...