Hot answers tagged door-frame
I'm not a pest control specialist but that's got insect written all over it, and given the proximity to that wooden architrave/post/whatever-it-is I'd be worried about termites or some other wood boring critter. Call an exterminator post haste.
I would bet the doors were dryer than they are now. Most basements are more humid than the rest of a typical home, especially in the summer. In the winter they will shrink again, but it will be needed to trim a little here and there to get them to work in the summer.
I had two doors that would stick, a hand plane was much more effective then sanding. If you do not have one buy an Empire Pocket plane, they are around 10 dollars and just as effective.
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