I'm finding that the Acer Aspire I'm using often seems to have a tendency to 'jump' to another part of the page I'm typing on. For example, I'll be happily bashing out a paragraph or two, look up and find that the text is not typing where it should be, but has 'jumped' elsewhere. Is this a common problem? This is the first netbook/laptop that I've had, so maybe there's something simple that I'm missing? Or maybe there's a problem with my netbook? (the problem I'm referring to happened whilst typing even this short message)