I've just copped 7.0.4 and it's exactly the same, doesn't show up in the today view or the calendar in the notification centre.
This isn't a bug though, this is change Apple have made, there's no way they would have overlooked showing All Day events, it's a decision for what ever reason I don't know. Possibly cause it's now quite text based with the today view and it refers to events as meetings with people and I guess all day doesn't make sense.
Anyway I think it's stupid, the weather is stupid and somehow takes up more space but provides less information. "Cloudy current and the high was 13C" Thats proper rubbish, no 7 day forecast with easy pictures to look at glance, now man gotto read the weather. They could have designed a well nice weather section with new graphics.
So it's not a bug that's waiting to be fixed, it always showed before iOS 7 and now the notification centre has been revamped and doesn't have it, I'm not sure it will be back not in a small update anyway, I hate the whole new notification centre, I lost my jailbreak to upgrade so I can wait to get that sorted.