WordPress Fix HTML5 Validation
This plugin fixes current HTML syntax errors raised due to how WordPress currently returns some links with rel="category tag".
Hopefully this plugin is temporary and WordPress will fix this problem.
At present it looks doubtful this will be fixed.
You can read more about this problem by [Searching WordPress for related discussions](https://www.google.com/search?q="site:wordpress.org"+"category tag"+"rel"+"validation error")...
Especially WordPress Ticket #22095 talks about what has been fixed (2 problems) and what has been deferred indefinitely (1 problem).
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The following is purely my opinion about this matter.
In most cases, your best option when having Web development work done is to make your payment contingent on the following checklist... meaning you only pay for your Web development after all checklist items are 100% met. No exceptions.
Some diehards in the audience may say Validator code lags standards. True. And I'd prefer adhering to the current Validator code rather than constantly trying to determine which errors and warnings are acceptable and which are real.
Your Web development checklist:
Having "No exceptions" in each case will also require you use a Hosting Company run by Wicked Smart Uber Geeks. I've yet to find any company who can tune up a Web server to run as fast as I tune mine, so I run my own "Iron" (servers which I admin personally).
This said, you may have some exceptions. You'll have to determine which are acceptable for you.
For me, "No exceptions" is mandatory.