On an instalation upgraded from 2-5-x to 2-6-x. If a user edits their "My Workspace" site through Worksite Setup->Edit->Edit tools
1) Get presented with an unchecked "Home" button
2) Checking this leads to a secong "home" tool being added to the site.
I suspect this has to do with a change to how Site Info identifies the home page thats missing from the 2-6-x conversion