My UK N900 seems to have a version of firmware that isn't available on the tablets-dev download site..

The US one seems to be version 002, where as my UK one is 203.2

Using the same command on 4 different N900, including mine, it reveals this other version some UK models are using:

dpkg -l |grep mp-fremantle

3 regular N900
ii mp-fremantle-generic-pr 1.2009.42-11
ii mp-fremantle-002-pr 1.2009.42-11.002
ii mp-fremantle-003-pr 1.2009.42-11.003

My UK N900
ii mp-fremantle-203-pr 1.2009.42-11.203.2

I wonder if the difference may allow for partial support of ALS/line-2 which seems to work on my UK model