ref: 02cd67ecb676cb1296d29630483e786f4f0303f6
parent: 67b37596c2d01b993d540aceaffa936606755f5b
author: Jacob Nevins <jacobn@chiark.greenend.org.uk>
date: Fri Mar 16 09:32:43 EDT 2007
Disallow clicks between squares. [originally from svn r7400]