Originally Posted by SkinnyGoomba
G, my house is sound and that has happened to me to some extent.
Warning: Spoiler! (Click to show)
After some time and plenty of settling on the part of the lumber used to construct the house, the drywall seems can show. This is also, in no small part, due to the fact that it's typical to use nails instead of screws to apply the drywall and also the installers rarely build up the coatings to a proper level.
I've spent quite a good amount of time fixing that and the worst place for it was in my stairwell. The walls were also showing plenty of unevenness.
The fix, for me, was to remove all of the popped nails and replace them with screws, then apply joint compound to all of the joints along the wall, drawing them out to about 12" or more on either side of the joint. I haven't had any re-appear and some of my work is now about 2-3 years old, and some of it a few months old (or weeks old) which is also still looking good.
I also screwed the drywall in a few areas just to add some integrity to the connection between the drywall and studs.
I had a few cracks where the original installed omitted the use of joint tape, and so I had to tape those joints.
FWIW the difference between good joint compound and bad is very little, in terms of price, so buy the good stuff which makes life slightly easier.
It's alot of work, almost all of the expense is labor....so I use my own labor....which is free to me.
I'm a little behind on the thread (I guess I have to remember to pay attention to it again since I'm a homeowner again!), but thanks for the thoughts. What you're describing seems to match pretty well with the other reading I've done on it, and it's reassuring to hear firsthand that someone else had this issue and it wasn't a huge deal. I think I'm going to keep an eye on it to see how it changes with the seasons and go from there. One thing I will say is that it seems to have stopped changing, at least noticeably, so I can't help but wonder if the changes I saw were because people were living in it again (e.g. more humidity).