Current mISDN-head kernel.modules broken?

Hi,

mISDN kernel modules worked great in the past for me. Current head gives
the following in dmesg:

localhost kernel: [422833.457216] hfc-pci.1: MDL_ERROR|REQ (tei_l2)

Inbound voice seems ok (as long as my server does not freeze
completely...), on the outbound channel nothing seems to be transferred.

Failing configuration:

Asterisk 10.8.0 <-> lcr (head) <-> mISDNuser (head) <-> mISDN (head,
compiled for kernel v3.5.4)

Working configuration:

Asterisk 10.8.0 <-> lcr (head) <-> mISDNuser (head) <-> mISDN (some
weeks ago, don't know exact last commit - modules compiled for kernel
v3.5.3)

This is reproducable.

If I find the time, I'll try to bisect the last commits.

Greetz
Sven