Ahem

Aaah, thanks !! I hadn't caught up to the fact that there's now a 64-bit bribes repo.
The only bribes repo I had a link to was http://www.bribes.org/perl/ppmdir.html, and that *is* exclusively 32-bit.
But, yes, http://www.bribes.org/perl/ppm64dir.html provides ppm packages for exclusively 64-bit modules, including Tk for perl versions 5.10.x to 5.20.x.

Cheers,
Rob