1. {{Dead link}} templates are embedded into other templates causing a display error:
https://en.wikipedia.org/w/index.php?title=2014_Ibero-American_Championships_in_Athletics_%E2%80%93_Results&type=revision&diff=748839012&oldid=745418842
{{Dead link}} should be outside other templates.
Note: The {{infobox}} series doesn't seem to accept {{dead link}} inside or out. I've started a discussion to learn what's going on:
https://en.wikipedia.org/wiki/Template_talk:Infobox#.7B.7Btlx.7Cdead_link.7D.7D_embedded_in_infobox
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2. When adding a new {{dead link}}, there is no space between it and the URL so the template merges into the URL string. In this example it displays correctly, but error-prone for other tools to find the end of the URL and parse.
https://en.wikipedia.org/w/index.php?title=Bob_the_Vid_Tech&type=revision&diff=748840811&oldid=747902217