Please read - ZoneAlarm Security Engine Registrar Add-On For IE8 related [ZA Free] ...
I have been having a problem surrounding the keying in of data into boxes at certain [not all] web sites. I had a similar problem [with Adobe Shockwave Flash Object Add-On] before and knew it was related to Add-Ons in IE8.
So, I disabled the Add-Ons one-by-one and tested at the affected web site until I hit on the ZoneAlarm Security Engine Registrar Add-On. This was the offender.
With the previous problem [Adobe], merely disabling/re-booting/and re-enabling the Add-On cleared the problem. This time [with ZoneAlarm] it did not.
Any suggestions ???