I just ran into this issue, using PXE netboot.A quick workaround, which seems to work correctly for me now is to just copy the vmlinuz-3.16.0-4-amd64 from 3.16.7-ckt7-1 over the linux kernel file on my tftp server.
FWIW, might help someone. -- Hans van Kranenburg - System / Network Engineer T +31 (0)10 2760434 | hans.van.kranenburg@mendix.com | www.mendix.com