For quite some time, there have been users complaining of DVB-T scanning problems using application such as MythTV or w_scan. Even stranger, they claimed that using /usr/bin/scan would indeed work as expected.
For example, this Launchpad ticket has tracked the issue for almost two years:
https://bugs.launchpad.net/mythtv/+bug/439163/
MythTV has a ticket tracking the issue too (although closed due to it being declared "upstream"):
http://code.mythtv.org/trac/ticket/9270
http://www.mythtvtalk.com/hvr-4000-fails-scan-11318/
I finally got my hands on some hardware to test with, and what...
