OK, I'm having he same issue now. I can't rez anything in my linden home. I used to be able to, but not any more. I'm well below my prim limit, and that's not the error message anyway. the actual message is:
"Can't rez object at { 84.5917, 202.363, 64.1744 } because the owner of this land does not allow it. Use the land tool to see land ownership.I'm well under my prim limit."
I checked the land tool, and yes I'm still the owner. Though I've never had trouble before, I'm rezzing in the middle of the room for a test. I was extra careful to ensure even the camera was within the property bounds. I changed groups, cleared cache, relogged several times. still no go. I even tried changing viewers, using the icky linden viewer.
I can rez in a sandbox, so its not the object or other strange issue preventing any rezzing. only in my own home.
Oddly enough, I can create objects. I just can't rez them. I even created a simple prim, took it to inventory, then tried to rez it. same error.