Mis!isippi has two

• Copy editor's catches
• Thit and thas?
• What spell-checkers catch
• Mistakes in the starred answers? (read the "wrong" letters in order for a bonus!)
• Key errors?
• Printed slips
• Proofer's catches
• Proofreaders' quests
• Keyboard goofs

Wiktionary Word definitions in Wiktionary
n. (plural of typo English)