In reply to Sion Roberts:
I have its forerunner, the LX3, and never use a case, so i'm not really answering your question. I just keep it handy round my neck, or in a pocket, or stuffed down front of shirt, sometimes in rucksack top pocket. Its got quite bashed and sometimes damp, even with seawater, but has not failed to work. Main thing with a camera like that is to have it to hand and I prefer not to use a case.