Yes. Multipath ghosting on analog channels. Many digital tuners don't deal w/ multipath well, either. That's why I said it's a "crap shoot" to try it.
With newer digital OTA tuners with 5th gen chips, it's not much of a problem, since 5th gen tuners mostly ignore multipath or use it to their advantage. The newest DirecTV HD receivers (HD20) have an OTA tuner with LG 5th gen chips. DirecTV Model HD20 is free after rebate, to new or existing D* customers at both Best Buy & Circuit City.