Two suggestions have recorded now, two weeks after the lineup change.
Both were spanish-language, and I don't speak spanish. They were unrelated to anything I had thumbs-up on.
I've had two calls with TiVo support, and nobody can give me any help. One guy told me to power cycle the TiVo. When I explained that I had already done that he told me I was uncooperative, and hung up.
The other guy told me to delete a lot of programs to make space. I don't think this is right, because the TiVo was recording suggestions like crazy the day before the TW lineup change, and stopped the day of, and I'm not storing more programs now than I was then. However, I have spent a lot of time pushing buttons to delete over 100 programs. Didn't help. In the last 24 hours, again no suggestions recorded.