Add a new category for "Common Mistakes and Workarounds"

Too many people are making the exact same mistakes and re-implementing the same anti-patterns. Borrow from fixingthesejquery.com and expand into articles so that these traps are well-documented canonically.

Some things that instantly leap to mind (let's expand this list) are:

• Injecting malformed HTML in IE (never works)
• Using HTML strings instead of actual manipulation methods to move things around the DOM (A lot of people who ask for an outerHTML solution need it because they're trying to do $("#bar").append( $("#foo").outerHTML() ) instead of the more practical $("#bar").append( $("#foo").clone() ) (or $("#foo").clone().appendTo("#bar")) (pretending for a second here that dupliateIDs are not a problem)... which leads me to...
• Duplicate IDs

Start by reviewing the proposed mistakes and workarounds in the issue and the existing Learning Center content structure. Define the category and article scope before writing; done means the recurring traps are documented as canonical, practical articles with the examples in the issue covered.