In netbsd.current.users, you wrote:
> On Sun, Nov 14, 2004 at 06:15:58PM +0100, Martin S. Weber wrote:
>> Yo current-users,
>> 
>> I've updated pkgsrc & built firefox-1.0nb1 on a 2.0G/i386; It built fine but 
>> doesn't run as expected.  (...)
>
> -sigh- and another datapoint for my ongoing senility. MESSAGE tells me what
> to do, listen to MESSAGE, everything works fine (delete "old" compreg.dat).

Been there, done that, got the T-shirt.

My problem is that MESSAGE's dumped during a mass rebuild are easily 
overlooked.