I had the same issue in 2 of my computers. For both the workaround was to remove syslinux-themes-debian-wheezy and then install it again with :
apt-get remove syslinux-themes-debian
apt-get autoremove
apt-get install syslinux-themes-debian-wheezy
Finally the package was installed correctly :
# dpkg -l | grep syslinux-themes-debian-wheezy
ii syslinux-themes-debian-wheezy 12-3 all collection of boot loaders (debian-wheezy theme)
I had the same issue in 2 of my computers. For both the workaround was to remove syslinux- themes- debian- wheezy and then install it again with : themes- debian themes- debian- wheezy
apt-get remove syslinux-
apt-get autoremove
apt-get install syslinux-
Finally the package was installed correctly :
# dpkg -l | grep syslinux- themes- debian- wheezy themes- debian- wheezy 12-3 all collection of boot loaders (debian-wheezy theme)
ii syslinux-
hope that helps.