Android back key doesn't work

[GoogleCodeExporter]

There are always onscreen buttons to go back from e.g. settings screens, but 
when using a phone, I'm very used to hitting the hardware back-key, which 
brings me to the android home screen instead. It would be much more intuitive 
if it just did the same thing as the onscreen "back"-key, where it makes sense 
(otherwise nothing..?)

Original issue reported on code.google.com by [email protected] on 18 Sep 2011 at 8:10