Continuity mistake: When Barry is talking to Vanessa, Barry is standing in front of a chocolate bar. In different shots you can see him standing on the right side of the chocolate bar.
Plot hole: Vanessa seems upset at Barry when their actions at getting the honey back from the humans result in the flowers and other plants dying. One might think that Vanessa, as a florist, would know the outcome and would warn Barry instead of helping him with his plan. Yet she appears to blame him for the entire outcome when it becomes apparent.
Continuity mistake: When Barry is talking to Vanessa, Barry is standing in front of some keys. In the next scene, the keys are gone. (00:24:20)