Solved with last update!

You can try this as a test: http://www.joaquimjmsilva.com/opera.html
Select is not triggering the onChange event.

I believe this a bug on version 18.

I'm having the same issue.

<select id="sku" name="sku" onchange="this.form.submit()"> <option value="">Select</option> <option value="UTXPOLO123456">Polo</option> </select>

onChange event is not being triggered on version 18!