Just Public Linden Parcels?

I've never had a problem with events save for having to delete and start over if I make a mistake with the time; I can only use public Linden parcel LMs to post events. What happened, and how can I fix it?

I'm age verified and I do have my preferences set to see adult content as well?

What other types of parcels have you tried? There are several (annoying) restrictions on where you can post events -- you have to own it or have the right perms for the group that does AND the parcel has to be a certain size. (For instance, I can't post events from the landing zone of my park, because the landing zone -- at 256 m -- is too small. )

Well, none. The events that I'm posting are on one specific parcel which fits the size requirement.
The funny thing about it is that owning the land has never been a problem before; I was able to post events quite often without problem. I have the feeling that I might've missed a change they've made since last week, as posting events was something I could do. Owning the land until now had nothing to do with it. And as far as I'm aware of, yes, the group I'm in does own the land.
I'll have go back and check, however.