The issue seems to be with packages from the raspbian.org repo.
Here's the output from 'sudo apt-get update' on one of the Pis:
and the /etc/apt/sources.list:pi@raspberrypi:~$ sudo apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages have been kept back:
epiphany-browser libfreetype6 libfreetype6-dev lxpanel lxpanel-data minecraft-pi
raspberrypi-ui-mods wolfram-engine
The following packages will be upgraded:
cups-bsd cups-client cups-common fuse get-iplayer libapache2-mod-php5 libcups2
libcupsimage2 libfuse2 php5 php5-cli php5-common
12 upgraded, 0 newly installed, 0 to remove and 8 not upgraded.
Need to get 203 kB/7,475 kB of archives.
After this operation, 297 kB disk space will be freed.
Do you want to continue [Y/n]? y
Err http://mirrordirector.raspbian.org/raspbian/ wheezy/main fuse armhf 2.9.0-2+deb7u2
404 Not Found
Err http://mirrordirector.raspbian.org/raspbian/ wheezy/main libfuse2 armhf 2.9.0-2+deb7u2
404 Not Found
Failed to fetch http://mirrordirector.raspbian.org/rasp ... _armhf.deb 404 Not Found
Failed to fetch http://mirrordirector.raspbian.org/rasp ... _armhf.deb 404 Not Found
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
--fix-missing doesn't seem to help eitherdeb http://mirrordirector.raspbian.org/raspbian/ wheezy main contrib non-free rpi
