Every winter, we get cracks like this where the walls meet the ceiling in certain rooms. We just got our bathroom redone, so it's most bothersome here. When springtime comes, they "seal" back up. Why does this happen and what's the best way to fix this? Or should I just hire someone? How much would this run minus painting?
Update: thanks everyone for your answers! ultimately, I think the best answer is the "cover it up with crown moulding" since that will look prettiest, add some value, and fixes the issue for the long term. But is that what I did? Of course not!! I went the "caulk it and hope no one notices" route, and, honestly, it looks pretty OK now. I used Lowes White Lightning Latex Caulk and filled in the gaps, then painted. I think there is still a question of how it will look in the spring when it closes up, and if it will "bead" when it compresses. I guess we will see. (FYI there's more info on why this happens in this article I found -- he also endorses the caulk solution: http://www.chicagotribune.com/classified/realestate/sns-201401131900--tms--askbildrctnab-a20140124-20140124-story.html)