Hi Kris,
>It appears there is a patch applied to netfilter-bridge to fix a problem
>with - you guessed it - bridging an ethernet to a wifi adapter.  I don't
>know if your kernel is old enough to be affected by this.  See:
my current Kernel is 2.6.12-17mdk

>Sorry, wish I could be more help.  I don't use bridging so I have no
>particular knowledge there.
Any advice is welcome I was lost...