A ZUL file loaded with Executions.createComponents(..., arg) contains a listbox with an optional column B, i.e. it should only be shown depending on arg.type:

<listbox model="...">
<listhead sizable="true">
<listheader label="A"/>
<listheader label="B" if="${arg.type == 'B'}"/>
<listheader label="C"/>
</listhead>
<template name="model" var="entry">
<listitem>
<listcell label="@load(entry.a)"/>
<listcell label="@load(entry.b)" if="${arg.type == 'B'}"/>
<listcell label="@load(entry.c)"/>
</listitem>
</template>
</listbox>

Problem: ${arg.type == 'B'} evaluates to true in <listheader>, but evaluates to false in <listcell> (because arg is null there).
This means column B is shown but the values of column C are displayed in column B.

It seems that BindComposer suffers from problem 2937096 (http://sourceforge.net/tracker/?func=detail&aid=2937096&group_id=152762&atid=785191), which was solved for GenericForwardComposer.
Debugging showed that Execution.arg is null in the template context (context is onInitRender event).

I can prepare a working test case if needed.