I can confirm this: clicking the tab doesn't work, the icons in the toolbar to go to the prev/next buffer or the keyboard shortcuts work fine, though.
>From the Scite 1.71 ChangeLog: * SciTE on GTK+ tab bar fixed to work on recent versions of GTK+. Please use the latest version or backport a patch (sadly I can't seem to find a standalone patch), because currently scite is completely unusable on edgy. -- Tabs don't function properly under edgy https://launchpad.net/bugs/61033 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs