If you compile your own kernel, be sensible and follow the suggestions in the help. Especially in the general setup. If you don’t you may be bitten by surprising bugs.
The other day I recompiled my kernel and then had some issue with my audio. Firefox would play sound, but VLC wouldn’t work, and Amarok would report an error like “xine could not initialize audio drivers”, or some such thing.
Apparently I forgot to compile in the System V IPC, which is necessary for xine. I have come to a decision to follow the recommendations found on the “General setup” page, unless I really know why not to. Or I forget. Again.