Their your is typed "You’re"

?
Spotted on ZDNet.com by Thomas on July 3, 2008.

This typo was found in a June 23, 2008, post on The Caucus Blog, the New York Times Political Blog.

This typo is engraved in black marble, part of a monument to the Daytona 200 motorcycle race.

Screen shot from local newspaper website found by L. Ellis in MA. 

CNN.com uses "loose" when "lose" is the correct word

Bills blames themselves

From the Buffalo News web site, www.buffalonews.com, this typo shows the
difficulty in getting subject-verb agreement when a singular entity like a
team has a plural name like the Bills.

mechanical, originally uploaded by adaminhull.

Adam found a cornucopia of typos in this coupon from IHOP.

should be "mid-sized" not "midi sized", originally uploaded by Shameful Typos.

Seen by Thomas at Wilson Farms.

The first typo is “pellet funs” should be “pellet guns”. The second typo is the missing punctuation from the last sentence.

Pre-paid bank cards will be provided in the following denominations:

$10 for non-working or antique guns, including pellet funs and BB guns. $50 for rifles or shotguns $75 for handguns. $100 for assault weapons

Seen by Thomas on the web.