Using combobutton with toolbar mold along with silvertail or sapphire theme, the layout is totally messed up
Tested on ZK sandbox as well with the following snippet of code
<combobutton label="menu popup" mold="toolbar">
<menupopup>
<menuitem label="Index"/>
<menu label="Menu">
<menupopup>
<menu label="Color Picker" content="#color=#029BCB" />
</menupopup>
</menu>
</menupopup>
</combobutton>