Adding an empty "default" style to a TextField messes up its baseline property. See the following sample code:

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import QtQuick 2.0
import QtQuick.Controls 1.1
import QtQuick.Controls.Styles 1.1

Rectangle {
width: 360
height: 360

Column {
Rectangle

{ color: "yellow" height: 100 width: 100 }

Row {
spacing: 20
Text

{ anchors.baseline: text_field_good.baseline text: "correct" }

TextField

{ id: text_field_good text: "good" }

}

Rectangle

{ color: "yellow" height: 100 width: 100 }

Row {
spacing: 20
Text

{ anchors.baseline: text_field_bad.baseline text: "wrong" }

TextField {
id: text_field_bad
text: "bad"
style: TextFieldStyle {
}
}
}
}
}