Tables + Templates
Tables break them.
Let's say we are in the Template namespace. We make a template that is a table, which is a pretty standard template actually. Now, we put some template params inside the table cells. We name the params and give them default values. In order to do this we break up the param with |. Remember, also, that the table cells separate cell attributes from content using |. The param is not actually parsed when we view the Template directly.
Let's say that the table cell had no attributes that we defined. It now thinks the param name is part of the cell attributes because it used the | from the param.
When viewing the Template in this way, a user now has no idea what the param name is, and effectively cannot use the template in another article.
Fixed by having the table parser check to see if it broke a param before trying to use it as an attribute.