wizink, then you must be in the worst category : the ones with broken installations
I don't know how much of the fault is ours, but if canola cleanup didn't helped you
(it actually tries to remove everything canola depends, and them do the apt-get update to fix installation problems)

Can you send me the error? just to see if we have an idea?

Also : what repositories did you have on the device? What device / firmware are you using?

Br

marcelo