When did you download version 2.3.6.7? If it was prior to July 20 then you should download it again as a few files were patched after the initial release:
Updated 2011-07-20 patched to fix a bug in the Contact Form and a script error that could occur if running in a non root site
the only files that changed are:
mojoPortal.Web.dll
mojoPortal.Features.UI.dll
mojoPortal.Net.dll
/ContactForm/MessageListDialog.aspx
/ClientScript/jqmojo/jquery.layout.min.js
You should also review the Important Skin Changes sticky thread for notes about skin changes since your previous version.
Hope that helps,
Joe