[beagleboard] Broken symlinks to /lib/modules/2.6.39-x1/build and /source

Install the missing header deb? (not installed by default to save space)

http://rcn-ee.net/deb/natty/v2.6.39-x1/linux-headers-2.6.39-x1_1.0natty_armel.deb

I would really try disabling the power management feature of the rt2x00 first..

Regards,