Yeah -- I've run into a few but pretty infrequently.
I'm not a fan of the cardboard digipaks, where more often than not, the CD is shoved into the slot with no protective sleeve. Simply removing them risks scratching the disc -- a really stupid design, IMHO! So I put them into standard jewel cases and cut up the digipaks into appropriately sized/proportioned sections to duplicate the usual jewel case inserts. Especially with out of print CDs, the last thing I want to do is risk scratching them every time I take one out to play it. I do not understand the "logic" of the digipak.