QFormLayout label alignment visually unpleasing on Maemo5

When creating a QFormLayout on Maemo5, the text labels are very far from vertically aligned with QLineEdit, QCheckBox and QComboBox widgets. On other platforms, they aren't pixel-perfectly aligned either, but not too far off. On Maemo5, they are much more off, making a user interface built with QFormLayout visually unpleasing.