Accidentally left something in the code that you weren't supposed to.
For instance. My company likes to hand me huge projects a day before they need it done. I can usually handle it, but sometimes I get overwhelmed and things slip my mind. So for one project a while ago one thing I had to do was create an online form for people to enter a contest. They would submit their information, it would get recorded to a database, and it would spit them out a nice thank you note. Well this doesn't take long to do and while I was testing it I put the text "Thank you for filling out our contest form (or something like that), now don't forget to wipe your ass". I don't remember why I put that in there, but I know I forgot to take it out. So when this went live we obviously got some complaints. More than a few. LUCKILY I wasn't canned (damn I love my employer), but I'll tell you I never even came close to making a mistake like that again.
So any other stories?
For instance. My company likes to hand me huge projects a day before they need it done. I can usually handle it, but sometimes I get overwhelmed and things slip my mind. So for one project a while ago one thing I had to do was create an online form for people to enter a contest. They would submit their information, it would get recorded to a database, and it would spit them out a nice thank you note. Well this doesn't take long to do and while I was testing it I put the text "Thank you for filling out our contest form (or something like that), now don't forget to wipe your ass". I don't remember why I put that in there, but I know I forgot to take it out. So when this went live we obviously got some complaints. More than a few. LUCKILY I wasn't canned (damn I love my employer), but I'll tell you I never even came close to making a mistake like that again.
So any other stories?