Recently I encountered a problem on my Laptop (running Vista) and my desktop (running XPw/SP2). The problem was when I typed anything on the Internet (i.e. Filling in a form, typing email,etc.) the cursor would skip spaces. This would result in either letters in words being left out and/or spaces between words being left out. After many hours of work and frustration I discovered what caused the problem. I am using Norton Internet Security 2010 on IE8. NIS2010 has 3 add-ons (i.e.. Norton Toolbar, Symantec NCO BHO, and Symantec Intrusion Prevention). I discovered that you have to "Enable" all 3 OR 'Disable" all 3. I had the Tool bar "Disabled" and the other 2 "Enabled" and that caused the cursor to skip spaces. Hopefully this will help some one who has the same problem.