Contradiction with Leviticus 11:44
Leviticus 11:44 commands keeping dietary laws, which contrasts with Acts 11:10's implication of abolishing such restrictions.
Leviticus 11:44: For I [am] the LORD your God: ye shall therefore sanctify yourselves, and ye shall be holy; for I [am] holy: neither shall ye defile yourselves with any manner of creeping thing that creepeth upon the earth.
Contradiction with Deuteronomy 14:3
Deuteronomy 14:3 enforces dietary restrictions, whereas Acts 11:10 suggests freedom from them.
Deuteronomy 14:3: Thou shalt not eat any abominable thing.
Contradiction with Matthew 5:17
Matthew 5:17 states that Jesus did not come to abolish the law, which may contrast with the implication of a new dietary freedom in Acts 11:10.
Matthew 5:17: Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfil.