I am using Ubuntu 11.10, with gnome3 (nautilus 3.2.0). I right click on a folder item (say, an epub file), and I try to open it with fbreader I just installed. But since fbreader is not the default application being used, I click on "Open With" and try to select fbreader from the list of available applications, but for some reason, it is not listed. 

So, out of habit, I try to look below to find the place where I would put the fbreader command so that fbreader will be used to open the epub file. Then I notice to my horror that the place where I could enter a command simply does not exist.

Then I try right click on the epub file and click on "Properties" option, and then go to the tab 'Open With', and again, I realize that I don't have any way to tell nautilus to use my preferred application to open this file. 

Even if I find later (say, upon logging out and then logging back in) that fbreader is listed, this is still a problem for me. I might someday need to use my own script to open some kind of files from nautilus (and for such a simple thing I would probably not like to write a .desktop file and then search on the net to figure out where I should put that .desktop file). 

(Well, I could always open the file from the terminal, but still...)

Regards,

Santanu Chatterjee