Duplicate Content on Blog

[grayloon]

I have a blog I'm setting up.  I would like to have a mini-about block set up on every page that gives very brief information about me and my blog, as well as a few links to the rest of the site and some social sharing options.

I worry that this will get flagged as duplicate content because a significant amount of my pages will contain the same information at the top of the page, front and center.

Is there anything I can do to address this?  Is it as much of a concern as I am making it?  Should I work on finding some javascript/ajax method for loading that content into the page dynamically only for normal browser pageviews?

Any thoughts or help would be great.

[Alex-Harford]

This is something a lot of websites do and something the crawlers can recognise. If you have say, a 150 word block that's the same on every page, and 400+ words of unique content elsewhere, you won't have any problems at all. There's no particular science to those numbers by the way, I'm just pulling them out of the air - but there's a helpful quote below from here: http://www.seomoz.org/blog/beat-google-panda

Here at SEOmoz, our PRO platform uses a 95% threshold to judge duplicate content. This means if 95% of all the code on your page matches another page, then it’s flagged as a duplicate. To check your own ratios, try this nifty duplicate content tool.

What you suggest in the last paragraph is cloaking. You need to be very careful when you're serving different versions of the same page to crawlers and users.

[X-X]

Maybe there is some way to wrap that text with a no follow tag?  The same way you would add a no follow to a link.