Cursor skips up 2 lines in middle of text on Windows Live E-mail!

Just loaded Windows 7 Pro. Very satisfied except cursor moves up a couple of lines when typing. Just did it twice trying to post this! Help!

Hi mideus & welcome to Windows 7 Forums

Can you post what you are typing on (eg) Keyboard, Laptop ? if its a Laptop try this test (put a credit card over the touch pads for a while to see if the problem stops. If so, your thumbs may be hitting the touch pad)