I have a form developed with IP 2007 that is published to a SharePoint 2007 Enterprise Server. I have digital signatures built into the form. When opened with the IP 2007 client, and clicking to add a digital signature, this window opens correctly:

However, when the same form is opened with IP 2010, I only get this part of the window, without the signature field, select image, and purpose field:

Hoping that this is a common issue that others have seen before, but I haven't found any posted in my searches. Anyone know what the cause is?