I use Windows 7, Gmail, and Firefox. When I compose messages the cursor often jumps, sometimes backwards, occasionally forward. I have tried Gmail help and so far have not found the problem.

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Are you using a laptop and accidentally touching the touchpad with your thumb or palm? – kobaltz Jan 2 at 17:41
Does it do this in any other software? – techie007 Jan 2 at 19:55
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closed as not a real question by Diogo, Tom Wijsman, random Jan 3 at 4:43

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