Thanks for your input.
You read right.... but both apt-get and synaptic report 0 broken packages.
The thing is that SPM lists 1683 in the 'Broken' filter screen.
Should be none listed there. (?) (see the screenshot)
Could be.... may be just an error in the number of packages listed in the broken filter ...
The thing is that after a complete removal of SPM and reinstallation, the list survived.
Shouldn't it have been done away with?
Could be ...... left overs from your upgrade. Just a guess.
But then it could be something else.
Makes me wonder ...What I did find interesting/strange was that in the course of removing SPM (using SPM, of course) I noticed that the number of packages listed by SPM as 'broken' was suddenly reduced to five or six packages. The application dissapeared from screen as I intended to delve further.