I'm not 100% but I think 'bleeping' out cursing or otherwise has something to do with the time of day the station airs it...
Not really on cable channels. They have the one edit that's "safe" for all day.
Actually I've already given an example where it is apparently the case on cable. Just five days ago on Syfy, they censored the uses of "sh*t" in Continuum
at 8 PM, but allowed its use in Lost Girl
just two hours later. Similarly, their sister network USA allows the word through in their 10 PM show Covert Affairs
, but doesn't use it in shows aired at 8 or 9. Which does lead me to believe it has more to do with time slot than content rating, since Covert Affairs
is rated TV-PG while Lost Girl