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I just upgraded from 6.0 to 6.2 to 7.0. All appears to be functioning properly, except I am unable to use the "Edit this Page" function.
I can mouse over the "Edit Page" button and access tools like Page Appearance. But when I try to click the "Edit this Page" button (to edit within a module on the page, for instance), nothing happens. Thus, I can't move modules to different layout panes, etc.