Firstly south of brimhaven dungeon (metal dragons) you can not teleport out of due to the fact it thinks it is dungeoneering.
Secondly the slayer master at home walks over slayer stalls so you can not reach him
thirdly you get 25 slayer points for doing turoths where as it should be 10 or 15 because it gives you 10 for medium and then 15 for hard
Fourthly recover special dosent work you only get an error message saying you can only do every 3 mins