Cracks in ceiling/wall joint

[Leigh-Anne Sayce]

Hi, I live in a rented house and recently I've noticed these cracks appearing along where our ceiling joins the walls. Do I need to be worried about this?
I've attached some photos.

 

[Harry Bloomfield]

The look like normal cracks to me, nothing to worry about. Due to normal expansion and contraction of the building materials, due to heat and humidity. Coving is often used to hides ceiling corner cracks.

 

[^woody^]

Do I need to be worried about this?

Not if you are renting. Common shrinkage.

You could argue that this is more than normal decorating and so is a landlord responsibility, not tenant's - this will include redecoration after the repair.