The Snack a Jacks thing was a common misconception as most other rice cake things ARE fine. I'll ask Heather to make sure they're removed from the list.
And in this country at least, Rice Krispies contain Glucose-Fructose syrup, but I don't know how high a percentage of fructose it is. Anyway, I ate Crunchy Nut cornflakes for ages with NO problems and they have the same thing.
And eating the safe protein sources is just fine! It's debateable whether that's an issue with the BTC diet at all. And anyway, that's only for a few days tops. You should be introducing other foods in this w/e anyway, so enjoy experimenting!
PS. as you get D, try Paracetamol & Codeine (NOT solpadeine as that contains caffeine) for the pain...it has a slight constipating effect which is a great side effect with D!