Hi,
because of one new contributer FriedZombie in the forums, we have new custom images based upon a so-called Backported version of the current AttitudeAdjustment release of OpenWRT.
That means, that all needed patches to make a device runnable on OpenWRT were "copied" down to the lastest release out of the trunk development. After collecting everything needed, you have to recompile the images.
In non technician terms:
We overcome the issue of the current trunk versions (bootup may not work correctly), because you now can use AttitudeAdjustment for the new devices like MR13U.