I have the same problem. I can use them fine if I create a CD entry manually, but they appear to be disabled when the entry is downloaded from a FreeDB server (I'm using the default server).

Inasmuch as FreeDB is not guaranteed to be right, I believe these buttons should *not* be disabled in this situation. FreeDB should be treated as a data source and starting point and not as an absolute authority.

If there is a way to make these buttons active, I have not yet discovered it.