American Heritage Dictionary
(1)
Century Dictionary
(1)
GNU Webster's 1913
(2)
WordNet
(1)
Elsewhere on the web
The Agency reports having no reason to believe the typo was anything other than an innocent error.— TreeHugger
All it takes is a single typo, a bad subroutine, or a buffer overflow, and suddenly things aren't working properly.— Applelinks.com
Amy: I have a hard time with earbugs (typo, and it stays) too.— Cynical-C Blog
When the typo was discovered, this served as a pretext for issuing a warrant for his arrest.— Sex Offender Issues
I meant this to say butter, but the typo is infinitely more apropos— Chromed Curses

Century Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word about twice a month.