Windows version?
Does this behavior persist if you start IE7 in No Add-ons mode? To start
IE7 in No Add-ons mode:
1. Right-click on the blue IE desktop icon and select Start without Add-ons;
2. Start > (All) Programs > Accessories > System Tools > Internet Explorer
(No add-ons).
More:
Troubleshooting and Internet Explorer’s (No Add-ons) Mode:
http://blogs.msdn.com/ie/archive/2006/07/25/678113.aspx
Does the problem persist if you Reset IE7 Settings (RIES)?
http://support.microsoft.com/kb/923737 <= Read before using!

Signature
~Robear Dyer (PA Bear)
MS MVP-Windows (IE, OE, Security, Shell/User)
AumHa VSOP & Admin; DTS-L.org
> Does anyone know why my keyboard would do this? Anytime I'm working in
> Yahoo email or trying to fill out an online form, my keyboard misses
[quoted text clipped - 4 lines]
>
> Thoughts?