ComoBox width not calculated properly

Hi,
we are using ComboBox with Vaadin 6.7.10 and sometimes drop down icon is displayed at new line - as you at attachment. I have dicovered that it is because parent div’s width is not calculated properly and inner elements can not fit into. Width of icon is 29px. Problem appears once per 20 page refreshes. Problem may be at VFilterSelect.updateRootWidth() method.
What am I doing wrong?
Thx
Ivos
12531.png