Input fields being filled in by plug-in?

Spurious vales appear (overwrite!) in form input fields and apply a green background to these.

I have a working website and there is a user form (in a password protected part of the site). ONE of my users displays this form via MS Internet explorer and values have been overwritten (like an autofill) with a green background.

e.g. number "350" should be shown but "admin" is instead (this happens on lots, but not all fields).

Example of HTML:
Any ideas what could cause this?

I am gessung a plugin of some sort??

Thanks!

re: Input fields being filled in by plug-in?

Maybe having Google toolbar installed?

re: Input fields being filled in by plug-in?

I beleive user does have google toolbar - and it seems likely that many people would - it seems very dangerous if fields are being populated with spurious values - isn't this a threat to all websites using "update" forms?

What does the green background mean?

re: Input fields being filled in by plug-in?

I don't actually use Google toolbar, but it would seem like any field it populates would be a recognized field, and it would fill it with previously saved data, so nothing spurious. Maybe the green means, "I think I recognize this field, so I'm filling it in, but I'm turning it green so you notice." I just remember previous coworkers having issues with Google toolbar autofilling fields and changing field background colors.

re: Input fields being filled in by plug-in?

On one site I was on it was suggested to add autocomplete="off" to the input statement.