Bug in 2.6.10-4 kernel-source?

[Adam Porter <adam@alphapapa.net>]

After spending about an hour or more configuring the kernel to not 
compile stuff I don't need, I left my old, slow laptop compiling 
overnight.  When I checked it now, I found this error:

security/built-in.o(.text+0x4e42): In function `avc_audit':
: undefined reference to `inet6_sk'

I remember enabling audit support, and disabling IPv6 support.

Is this a bug in the dependencies for this particular kernel source? 
Seems like I should get a warning if I enable something that requires a 
disabled something to compile.