Microsoft Media Center always showed what was a repeat. If it didn't say "Repeat", then it was a new episode. That gave me the opportunity to quickly scan for where the new programs were.

The guide XML files I have use the <date> tag to provide the original airing date. I could see if the <date> tag was different than the guide date, then it would be a repeat. I certainly don't know if all XML files include that tag, but if it is available it would be good to know if the program was a repeat or not. Even just posting the original air date would be useful.

Thanks and regards,
Ron Keen