Combobox not correctly rendered in Chrome


We are having an issue with some Combo boxes in Google Chrome 26.0.1410.43 m, and Vaadin 6.8.9 with GWT dependency version 2.3.0.

The combobox content correctly shows the content after selecting a new value.
However, when the page is loaded with some data put in the combobox, the content of the combobox is not rendered under Chrome, where under IE and FF, the same page is displayed correctly.

When zooming under Chrome, or sometimes after klicking some random areas, the combobox is correctly repainted showing the inner value.
When clicking on the drop down button, we see that the correct value is preselected in the list of available values in the popup, but it is just not showing in the inner array of the combobox, until zooming in or out on the webpage.

Is anyone else experiencing this kind of issues? How did you resolve it? Is there any information I can provide to help one in investigating this further?