Next time copy the monobook skin to a new skin and edit that. That way
you can always just switch back.
I installed Wiki again, and now the problem is gone.
But I still can't figure out what caused it, because the sidebar is exactly the same,
and all scripts and extra lines in monobook.php (in connection with the sidebar) had been
It makes you uneasy to change anything again.
And why problems in Firefox and not in Explorer?
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