Affects Version/s: 2.0
Fix Version/s: 2.1
lobo has confirmed that this is a bug and asked me to post to the issue tracker.
We created a test mailing that contained 2 url's. One worked just fine but the other did not and generated a "404" error.
In researching this, it appears that the "url_tracking parser" chops certain url's off because they contain unorthodox characters... (,.). We ascertained this by looking at how the url was stored in the table.
Here is the problematic url:
I realize it is not good practice to use commas in a url, but we do not have any control over this.