span is certainly a valid tag. Possibly its a bug in TinyMCE that only happens in lists. If you've upgraded mojoPortal over time, you probably have older versions of TinyMCE on disk and you could switch back to an older version by editing this in web.config and pointing it to one of the older versions that you may find under /ClientScript
<add key="TinyMCE:BasePath" value="~/ClientScript/tiny_mce356/"/>
possibly this bug doesn't exist in other versions of TinyMCE
please only post one question per thread, the menu quesiton should have been on its own thread as it is not related to the subject of this thread.