I've seen posts here about not having TiVo suggestions record, and I have called TiVo several time on the issue. They had me reboot, delete and redo thumbs, delete and re download program info, etc. Now I can see a few suggestions in the Browse TV & Movies screen, but only two or three, and no suggestions show in the To Do list. The other day I actually saw a suggestion record but the recoding ended and to my surprise it did not save.
I'm seeing the exact same behavior on 2 new Tivos. I wish they would fix this.