Knockout - NO_MODIFICATION_ALLOWED_ERR: DOM Exception 7

If you're doing any konockout.js data-bind work in Chrome and you see the error:

NO_MODIFICATION_ALLOWED_ERR: DOM 
Exception 7

Then check that you haven't done:

<input data-bind='text: property' />

when you meant to do:

<input data-bind='value: property' />

Doh!