Denver Recordings: Location recording by Steve Lillywhite. Produced for Source by EDR Entertainment and recorded on the Effanel Music Mobile Facility, Denver, Co. June 5th, 1983.
Boston Recordings: Location recording, produced by DIR Broadcasting and recorded on the Effanel Music Mobile, Boston, Mass. May 6th, 1983.
St. Goarshausen Recordings: Location recording courtesy of "Rockpalast 83", WDR Television, West Germany, August 20th, 1983.

There are two very different versions of this recording.  During "The Electric Co." Bono included a snippet from the song "Send in the Clowns" and the recording was released without paying proper royalties for this track.  Legal action was taken, and U2 ended up paying for the use of that 30 second snippet of the song.  Thus later editions of the recording had the "Send in the Clowns" snippet edited out of the recording.  Somehow as we moved into the CD era, CDs were pressed with both versions of the song - including the snippet and not including the snippet.  There have been other differences in the editing of other tracks as well, but these are minor compared to the 30 second edit during "The Electric Co."

Some of these other minor edits are cataloged below.  I would love to hear of other variations, or where your CD fits in below:
 

Both the USA and Canada versions of Party Girl are missing the "one more" at the start of the Australian version.  On the Canadian version, this line of Bono's is included at the end of I Will Follow.  The track lengths included in the track listing above are how they are listed on the back of my CD.  One immediately notices that none of these match up with any of the above versions.  Many of the other differences in track times are where the "live" recording of crowd noise between tracks has been split.