In GTK LAF, complete text is not seen in drop-down of JComboBox. This may be due to improper computation of preferred-size. Attached is the screenshot from 1.5.0-b40 and 1.4.2.

Compile and run JComboBoxTest.java in GTK LAF. Drop-down the list, see if numbers can be seen properly towards the end of each item. If its not visible, bug is reproduced.