Pentax K-01 mode dial detaches.
The dial is held-on by rubber cement. Interestingly, inside the concave on the "prism housing" where the mode dial sits is what appears to be a thin strip of teflon or some such material that the mode dial floats on. What seems to have happened is the material peeled up on the corner, or bunched up and the added pressure broke the dial loose from its pads of rubber cement. This isn't catastrophic, the dial can be re-glued.
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