Network Interfaces Not Initialized On Boot

["Cloaked Hunter" <djholt@infowest.com>]

I'm running the testing release of Debian. I recently updated my Debian
packages, and I also built and installed a new 2.6.14 kernel. Now,
regardless of what kernel I boot, none of my network interfaces will
initialize during boot, not even the loopback interface. If I manually
start them using ifup -a, everything works perfectly, but I cannot
identify what is preventing them from initializing automatically during
boot. Any suggestions? Thanks in advance for any help you can provide.