[Bug 75101] adding,checking or delete dont work

[Oliver Sic]

Public bug reported:

Binary package hint: alacarte

I cant change anything, neither adding something, checking nor deleting.
The same problem is with  adding or changing the default application, i
want to open a file. It allways shows a message like: "Application could
not be added to the application data bank"

** Affects: alacarte (Ubuntu)
     Importance: Undecided
         Status: Unconfirmed

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adding,checking or delete dont work
https://launchpad.net/bugs/75101