Warning: KLD '/boot/kernel/linux.ko' is newer than the linker.hints

[Peter Steele]

I have a process that automates the creation of a master FreeBSD image that we clone onto mulitple machines. In the latest version of this image I am seeing the warnings: 

warning: KLD '/boot/kernel/linprocfs.ko' is newer than the linker.hints file 
warning: KLD '/boot/kernel/linux.ko' is newer than the linker.hints 

What might be causing this? I am not doing anything in particular with this Linux component during the image creation process, and these are the only such warnings. We do install a custom kernel as well, but I did not see this error in earlier versions of the image creation process.