This is the link you have below that post for "Ry Cooder."
That isn't the link to the global tags page for Ry Cooter, This is.
The links on ALL of these are wrong:
http://en.wordpress.com/tag/slide guitar http://en.wordpress.com/tag/”Feelin’ The Blues” http://en.wordpress.com/tag/Song of the Day http://en.wordpress.com/tag/Song of the Night http://en.wordpress.com/tag/Delta Blues
No " or ' or any other special characters, no upper case, and no spaces. Spaces are to be replaced by dashes and put a trailing " / " on all of them.
/tag/slide-guitar/ /tag/feelin-the-blues/ /tag/song-of-the-day/ /tag/song-of-the-night/ /tag/delta-blues/
If the links are correct, then they take you to the correct global tag page. If they are not, then they will not.