I think spelling does matter, maybe not as important on here as when preparing a report/presentation where your professional competence is going to be judged. There isn't a spell checker on here but there is always the dictionary if a word doesn't look right. I don't use the preview function on here very often so I tend to see what I've written after I've posted it, if I've mispelled something then I usually correct it, even if it's an obvious typo such as double-typing a letter or repeating a word. I was brought up to consider myself a 'good speller' so much so that for years I spelt certtain words incorrectly on the basis that if that was how I thought it was spelt then it must be so. I mean 'occaision' for example, and 'dilemna' still looks more correct to me than 'dilemma', but I bow reluctantly to OED on the matter. Naturally none of this applies if you are Nigel Molesworth and of you may of corse du as you pleese.