GnuCash 2.6.8 released

[Plutocrat]

Sorry. Just saw this

Ron Schnatzmeyer wrote on Thursday, 01 October, 2015 05:24 AM:
> Err http://archive.getdeb.net rafaela-getdeb/apps amd64 Packages
>   521  Origin Down [IP: 104.28.24.125 80]
> Err http://archive.getdeb.net rafaela-getdeb/apps i386 Packages
>   521  Origin Down [IP: 104.28.24.125 80]
> N: Ignoring file 'getdeb.list.bck' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension

OK, so it looks like you might also have the wrong repository installed. The one that works for me is as previously indicated (Mint 17.2 is based on Ubuntu 14), so change the line in 
/etc/apt/sources.list.d/getdeb.list 
to read.

deb http://archive.getdeb.net/ubuntu trusty-getdeb apps

You can also delete this duplicate file if you like. 
/etc/apt/sources.list.d/getdeb.list.bck

P.