Hi Dave: (hope i'm addressing this issue to the right person!) When making bzImage with the current BK I receive the following during the final link process: net/built-in.o(.text+0x4ba22): In function `xfrm_probe_algs': : undefined reference to `crypto_alg_available' net/built-in.o(.text+0x4ba68): In function `xfrm_probe_algs': : undefined reference to `crypto_alg_available' this is because ipv4 seems to depend on some Cryptographic API stuff... that doesn't sound right though! Anyway, I added base Cryptographic API support to shut it up, and the link went fine. But this was definitely not added until recently - I was able to compile all 2.5.54 BK cleanly. What's the deal now? Regards Josh