>> +	m_copydata(m, 0, sizeof(eh), (caddr_t)&eh);
>> +	m_adj(m, sizeof eh);
>any point to copy and m_adj here while you're using m_pulldown?

	you can't reliably use pointers that points outside of
	[m_data, m_data + m_len].  therefore i've copied it.

itojun