Arch Linux

Description:
Currently, the nvidia (and nvidia-173xx/nvidia-96xx) packages contain the nvidia-binaries for the current kernel in [core], this is reflected in its list of dependencies.

Some users (see http://bbs.archlinux.org/viewtopic.php?pid=683199) do not realize that custom kernels require a self-compiled nvidia driver (to place .ko in the correct place). In addition, running the nvidia installer (which uses uname -r to identify the running kernel) seems to work, hence the problem is assumed to be with Arch's package.

Suggestion:
In the post_install() section of nvidia.install (or similar files for the other nvidia driver packages), add a warning which looks something like this draft:-

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This nvidia binary is meant for use with the stock ARCH kernel. We detect that you are currently running a custom kernel. Please compile this PKGBUILD using ABS instead of installing the binary package from the repos.
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This warning should only be shown if `uname -r` returns a value other than <kernel_version>-ARCH, one possible check would be:-

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if [ $(uname -r | awk '{ print substr( $0, length($0)-4, length($0) ) }') -eq "-ARCH" ]
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Possible Improvements:
Is there a way to check the contents of the just-installed package in post_install()? If so, we can further check whether the just-installed package installs to /lib/modules/$(uname -r) and disable the warning in that specific case.