LabelToolItem is not working properly on IE8

LabelToolItem is not showing the text properly on IE8, while on Mozilla woks fine

Code:

---

LabelToolItem labelRecord = new LabelToolItem("Scheda");
LabelToolItem labelPage = new LabelToolItem("Pagina");
...
toolBar.add(labelRecord);
...
toolBar.add(labelPage);
...
layoutContainer.add(toolBar);

toolBar.layout();
layoutContainer.layout();

---

Attachment 25578Attachment 25579

I'm using GWT 2.2.0 and GXT 2.2.3