Yaobing,
I've installed the latest dvico drivers for the fusion 3 card. It didn't fix the problem with switching back and forth between the analog and digital channels. Once I switch to the analog channel, switching back to a digital channel gives a no signal problem. The ONLY way to get it to work again is to reboot the PC (or use the dvico tv program with which I can view the digital and analog channels but even after going back to a digital channel, MC doesn't work without a reboot).
Also, for some reason in MC, the latest 11.1.148 build, the channels stopped working (except for a single channel, 5-1. All of the other channels gave good signal strength indications, said 480i, then just gave a blank screen.
I then deleted all of the channels and rescanned the digital channels. It only found one channel.
Next I rebooted the machine, ran just MC, rescanned the digital channels and it found the ones it should. When I try to play them it works sporadically. I then changed the video filter, tried different filters and MC still worked sporadically. Interestingly, with one of the filters, it always said the resolution was 240p no matter what channel I tried.
Just for the heck of it I switched back to "let direct show choose the best filter". This worked the best of all the options though when it tried to display a 1080i picture I ran into the screen formatting problem again.. Finally while in the "let direct show pick" mode, when I switched from a channel in one resolution to one in a different resolution, MC bombed.
If I use the dvico tv app it finds about 10 channels with multiple subchannels and I can switch back and forth from analog to digital with it and all of the channels work.