Got unexpained "access denied" troubles keeping people from your content? Go to admin/content/node-settings, and try the 'Rebuild Permissions' button.
If that doesn't work, see other ideas for access denied for visitors and access denied for admins.

That is odd, as it seems you've checked all the bases for probable culprits... Are you sure that there isn't some third-party teaser- or excerpt-related module still active?
Another possibility: The "read more" links are a remnant of some past configuration or module use; even though the site should no longer be creating the links, they won't disappear until the affected nodes are re-edited and saved. If you edit one of the nodes with the mysterious "read me", and save the node (even if you make no changes to anything in the node), does that node still display "read more" in lists?
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Got unexpained "access denied" troubles keeping people from your content? Go to admin/content/node-settings, and try the 'Rebuild Permissions' button.
If that doesn't work, see other ideas for access denied for visitors and access denied for admins.
Hello! I just would like to give a huge thumbs up for the great info you have here on this post...
I may not have a chance to test that for a while, but meanwhile I welcome commentary from anyone...
Hey,
Since I still see some links here, and the guide is quite good, I thought that I may...
Nice article i like the way you thoroughly wrote it.