When you try to create a new schedule or change an existing schedule for the content source in MOSS you get an "Access Denied" Error

This occurs when the WSS_WPG group account does not have the correct permissions to the %windir%\Tasks folder on the computer that is running the Office SharePoint Server 2007 indexing service. Follow instructions on the link below to fix this:

http://support.microsoft.com/kb/926959

Issues with Gradual Upgrade to MOSS from the Learning Gateway

I tried to do a gradual upgrade (making a copy of the existing content DB and running an upgrade on it) to MOSS on an existing Learning Gateway 2003 and it kept failing until I eventually removed the 16 LG web parts using STSADM. Unfortunately this broke a lot of the sites even though the upgrade procedure went through. The sites based on the LG templates were giving errors in MOSS mainly due to the 'Welcome' code embedded in the page. Also I found that document libraries in LG pages came across as Data Connection Libraries. Don't know if this is a one off but haven't had time to test it further as I am on a customer site. I have now created a new MOSS farm and recreated the LG site structure. I will be migrating document libraries manually.

Update:

The conclusion I have come to is that there is no upgrade path from Learning Gateway 2003 to MOSS 2007.