While talking with Andy in Merlotte's, Jason sticks his fork backwards into his sandwich. In subsequent shots, the fork disappears and reappears.
When Jason is talking to Tara at the bar, the level of beer in his glass goes up and down.
Franklin gains access to a house despite being a vampire and not being invited. The True Blood lore (like many other vampire lores) says vampires cannot enter a house without an invitation. However, that only applies to houses owned by humans.
When Sookie shows Eric the Operation Wolf symbol on a coaster. Eric throws it down, and it makes a heavy noise, but later has changed to paper when he crushes it after his flashback.