When Vala is being held by Adria, Vala's wristwatch reads "2:16" yet when she is released seconds later, her watch reads "2:56" (visible when Adria ascends).
The length of Vala's pony tails go from long to short, to long again, at various times.
While Adria is preparing to ascend, the lead wires to her vital sensors switch from laying across her chest to draped over her shoulder then back again.
While SG-1 is investigating and approaching the camp on P3R-112 with all the supposedly poisoned, dead Jaffa, and while the camera is close-up on Mitchell, one of the Jaffa towards the background can be seen laying on the ground moving his legs.
Ba'al has a British accent, while Adria has a North American accent. When the Ba'al clone takes control of Adria and her mind, Ba'al speaks from inside her body but the actress still uses a North American accent instead of a British one.