> Hello all,
>
> I did the same (double) error twice, with obviously the same result
> twice. The first time, I continue to use the system, which meant that I
> did not know where was the error.
>
> The objective was to install Firefox 5.0.
>   1 - I copied a directory /usr/local/firefox/ from a system used before
>   2 - I tried to edit a firefox icon coming also from the other system,
>   3 - I completely uninstalled firefox using Synaptic (that did not
> removed the ~/.mozilla/).
<snip>

When you deinstalled Firefox I think you took
kubuntu-default-settings-trinity with it.  Check to make sure that it is
still installed.

Tim