As it is, we put notes about a package (such as "this package won't work unless you do foo") in post_install(). That's a problem because it's easy to miss these notes when doing an "emerge --world update". We really need a specific function for such notes, and all notes during a single emerge session should be combined and printed _after_ the rest of emerge finishes.
*** This bug has been marked as a duplicate of 462 ***