In version 5 my toolbars are playing up

Dropdown menus wrap to the next line



<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <contextmenu>
        <item name="Editing" value="True"/>
        <item name="Format" value="True"/>
        <item name="Insert" value="True"/>
        <item name="InsertAdvanced" value="True"/>
        <item name="InsertFiles" value="True"/>
        <item name="InsertForms" value="True"/>
        <item name="Relative" value="True"/>
        <item name="Tags" value="True"/>
        <item name="Verbs" value="True"/>
    </contextmenu>
    <toolbars>

        <item type="g_start" />
        <item type="image" name="Bold" />
        <item type="dropdown" name="FontSize" width="40" text="[[FontSize]]" command="FontSize" />
        <item type="g_end" />
    </toolbars>
</configuration>

Any idreas?