I have one IP 2010 form that, after I change its design, all of the Action Rules disappear for the buttons. The form is published to a Site Content type, in a location with versioning, so thankfully I can retrieve the last known-good copy. If I Export Source Files and file compare the known-good manifest with a corrupted manifest, I can see that the corrupted manifest is missing a section (below). Any idea what could cause this? It's happened several times with this particular form. Many other forms I've created/modified are just fine. Thank you.
<xsf:menuArea name="msoInsertMenu">
<xsf:menu caption="&Section">
<xsf:button action="xCollection::insert" xmlToEdit="group4_529" caption="group4"></xsf:button>
<xsf:button action="xOptional::insert" xmlToEdit="deptHeadCertGrp_730" caption="deptHeadCertGrp"></xsf:button>
<xsf:button action="xOptional::insert" xmlToEdit="chairCertGrp_734" caption="chairCertGrp"></xsf:button>
<xsf:button action="xOptional::insert" xmlToEdit="chairCertGrp_743" caption="chairCertGrp"></xsf:button>
<xsf:button action="xOptional::insert" xmlToEdit="officeGrp_752" caption="officeGrp"></xsf:button>
<xsf:button action="xOptional::insert" xmlToEdit="officeGrp_755" caption="officeGrp"></xsf:button>
</xsf:menu>
</xsf:menuArea>