Hi, I also experienced the same problem: the Zarlink ZL10353 DVB-T not beeing able to find any Services (always having Bad Signal). I found closing and reopening the frontend device just before the ioctl FE_SET_FRONTEND, making the whole thing work!
I posted a little diff here: https://www.lonelycoder.com/redmine/boards/4/topics/3968?r=6774
Somebody has an idea what the root cause might be? Is it a problem in the driver?
Cheers