When Crusoe comes up from the hull of the ship, after salvaging provisions, there is a CINDER BLOCK in the frame behind Mr. Quinns "Crusoe" character. Cinder blocks were not used until the 1920's.
The film looks to be in the spring or summer of 1808 the problem with this is the Atlantic Slave Trade was abolished by congress January 1st 1808 so the import of slaves from Africa would have never happened in this year any longer..