They work again but you need to wrap them in the tag.
[tweet]https://twitter.com/LoveTheShirt/status/298829002024570880[/tweet]
Code:
[tweet]https://twitter.com/LoveTheShirt/status/298829002024570880[/tweet]
[tweet]https://twitter.com/LoveTheShirt/status/298829002024570880[/tweet]