CListCtrl and Unicode(?) Problem

This little bug's got me stumped. I've got a listctrl that I'm dynamically creating in a formview. It is a report style listctrl, which allows the editing of the items.  

I'm handling the EndLabelEdit message with the message maps, in the formview:
ON_NOTIFY(LVN_ENDLABELEDITA,IDC_REPOSITORY, OnEndlabeleditRepository)
     ON_NOTIFY(LVN_ENDLABELEDITW,IDC_REPOSITORY, OnEndlabeleditRepository)

I ended up using these, as a solution to a previous question I asked, where handling LVN_ENDLABELEDIT was not enough to catch the message.

Up to this point, things work fine, and I can handle and validate the edited text.  The problem is here:

void CMyView::OnEndlabeleditRepository(NMHDR* pNMHDR, LRESULT* pResult)
{
 CMyView::OnEndlabeleditRepository(pNMHDR, pResult);
 LV_DISPINFO* pDispInfo = (LV_DISPINFO*)pNMHDR;    
 CString strText = pDispInfo->item.pszText;
 //do something with the text...
 *pResult = TRUE;
}

If I was to enter "Test" then
pDispInfo->item.pszText = T\0e\0s\0t\0
so strText ends up equalling "T"

I think this is a UNICODE issue, and I don't currently have the preprocessor _UNICODE defined.  But it's my understanding that a CString should take this and convert it correctly, right?

This works correctly on Win98, and I get this problem on WinNT.

Any ideas on how to remedy this?

Thanks,
Marcus