chmod - "w" yes but why not "r"?

pkgname=openbox-todo
pkgver=2
pkgrel=1
pkgdesc="A simple TODO list that integrates into the Openbox menu"
url="http://bbs.archlinux.org/viewtopic.php?id=91544"
arch=('any')
depends=('zenity')
license=('BSD')
source=('openbox-todo' 'LICENSE')
md5sums=('e85e57044eb1165138f8e66179528657'
         '8e773e32775fb019d2ed185754cdb2d4')

build() {
  # Making dirs
  install -d -m 755 "$pkgdir/usr/bin" || return 1
  install -d -m 755 "$pkgdir/usr/share/licenses/openbox-todo" || return 1

  # Copying files
  install -m 755 "$srcdir/openbox-todo" "$pkgdir/usr/bin/openbox-todo" || return 1
  install -m 644 "$srcdir/LICENSE" "$pkgdir/usr/share/licenses/openbox-todo/LICENSE" || return 1
}