If your backup is stuck in a queueing state and being skipped the next day because of an already running instance, the problem may be due to a crash or unexpected reboot.
Make sure you do not have a state lockfile located at:
/var/cache/driveclient/backup-running.lock
after shutting down the daemon, this shouldn't exist.
Thanks to Evan B @ Rackspace for the quick pointer!
Oct 9 16:29:09 <hostname> kernel: driveclient[28672] general protection ip:7f06ec55e867 sp:7fff0a73adb0 error:0 in libgcc_s-4.4.7-20120601.so.1[7f06ec54f000+16000]
Haven't really done much rpm packaging before, so I tried it out on a package I haven't found elsewhere yet. DSH is a package that allows you to distribute commands out among different hosts in parallel.
These are CentOS6 x86_64 binaries for dsh and libdshconfig.