[Hardy] Autocomplete (tab) doesnt work when using sudo

I noticed that the autocomplete function in terminal doesnt work anymore when you use sudo. For example when doing sudo aptitude install, I used to be able to just type sudo apti (tab) inst (tab) and it would normally autocomplete the line. Also double tapping tab used to show all possible commands that would fit. However this does not work anymore. Is there something I have to change in order to get that functionality back or has it just not been implemented yet?