(CONFIRMED) Obsolete Music icon in 'we can research' trade screen

The Music tech icon shouldn't be displayed in the 'can research' column,
but in the 'will trade ' or 'will not trade' colums.
Pacal, Darius and Hatshepsut already have the Music tech.

Were you using the "No Tech Brokering" option? I reported a bug a couple of days ago concerning incorrect techs displayed that seems to be related to that option.

http://forums.civfanatics.com/showthread.php?t=234808

If that's not it you'll probably need to post a save game for them to find the problem.

No, that option wasn't on.
Btw, when I traded for Literature, the icon disappeared.

Similar problem with Fiber Optics.
Lincoln/Frederick have Fusion and from the message above they also
have built the SS cockpit part.

I think this is another example of the same thing here:

http://forums.civfanatics.com/showthread.php?t=238927

unfortunately 'we can research' ACTUALLY means "We might have it" OR "We can research it"

Technically it means that you know they have the Prequisites (The category either needs to be eliminated, redesigned, or Renamed)

Both of those problems are seperate however, because it was showing up because you didn't have ALL the prerequisites for the tech... you should just need enough prerequisites to know they had it.