Some objects stop rendering?

Has anyone noticed that after UV mapping some objects stop being renderable? I havent changed layers or anything they just wont render. I am sharing a texture across lots of UV unwraps, could I be running out of memory?

I had a similar experience a while ago. Eventually discovered that I had accidentally turned off renderability on some selected objects in the outliner without realizing it. Don’t remember doing it at all. Don’t know how it happened. Fat fingers I guess.

Bingo! Thankyou sooooo much zavigny. I don’t think that I would have looked there for ages. Feel stupid. I often switch objects via outliner when I can’t select them in 3D view.