First sorry for my bad english, i'm french
I use LMDE 201204 32 bits with cinnamon on my 2 computers. Since i've installed the last update of cinnamon (1.6), the completion with TAB doesn't work on option commands but is ok with files and folders...
Example :
Before when i typed "sudo apt-get ins + TAB", the text became "sudo apt-get install" but now it's doesnt work on my two computers ; the text stays with "sudo apt-get ins"...
I've asked a friend to verify on his computer before the installation of cinammon 1.6 and it's ok... then he has decided to setup cinnamon 1.6 and now he has the same problem...
What happens? can you try on your computers? is it a general bug
PS : I repeat : the completion works with files and directories. For exemple if you try "vim /etc/hos + TAB" the text becomes "vim /etc/hosts"...

