Etch update of ivtv-modules-2.6.18-4-686

During the recent mythtv and Debian Etch re-install from scratch for the nth time, the system returns a message saying that ivtv-module-2.6.18-4-686 is not found. I had input several mirror sites in the /etc/apt/sources.list but still got the same message.

I worked around this by doing a m-a a-i ivtv after installing the ivtv-source. Thus, the installed version of ivtv-modules-2.6.18-4-686 is now 2.6.18.dfsg.1-12etch2, which is consistent with linux-headers and linux-image.

During the daily update notification, the system indicates that the update of ivtv-modules is available and its version is 2.6.18+0.8.2-4+etch1. I inadvertently allow the system to do the update since I did not catch the version in small print. The update process came back empty because the same error occurred - ivtv-module-2.6.18-4-686 is not found.

Is there any way for me to tell the system to ignore updates associated with certain packages? I need to mention that I started using Debian Etch since March so please use newbie-friendly language.

Thanks,
Hoang