Continuity mistake: Guy of Gisbourne says to Robin Hood that he should lay down his weapons. Robin Hood throws his bow and sword on to the ground. He then gets thrown down the cliff, into the river. A few minutes later, when we get focused on him again, we see that the bow is lying in the river with him. (00:06:05 - 00:10:55)
Continuity mistake: After the eclipse Robin stands atop the castle wall speaking to the people. Over Robin's shoulder in the sky is seen a waxing gibbous moon... minutes after an eclipse.