Usually, dialog boxes allows keyboard navigation among the options it presents. For instance, considere the dialog box that asks if you want to save the username and password you typed. It presents 3 options: "save", "never for this site" and "no". It should be possible to change the options by typing the left and right navigation keys. Actually, as such navigation is a human-computer interface standard, I hoppe we manage to have this feature in future versions.
*** This bug has been marked as a duplicate of 84308 ***