The Taz YD 116:6 on the last line brings a case that he heard that one should protest putting a needle into bread. What is the Taz referring, to and what exactly is he worried about?
As far as I know, the most accepted Posek around the entire non-Chassidic Ashkenazi world is the Mishna Berura (and of course the Rama). He wrote the sections to his commentary to the Code of Jewish ...
Shulachan Aruch (OC 135:10) holds, and Rama (there) seems to also hold, that if a kohen (or levi, m.m.) is called as acharon then the gabai should say "af al pi shehu kohen". The purpose of this is to ...