M.Drochner@fz-juelich.de said:
>  (still strange that nobody noticed it, the last change to if_vlan.c
>   was in january) 

to correct myself:
actually, the breakage was not unnoticed, see
PR kern/20363: Using vlan devices with bge as the parent does not work
by Scott Ellis, in february

Scott, does the patch in my previous mail to tech-net fix your problem?

best regards
Matthias