Silly Programming screw ups (funny)

I'll contribute with probably my least serious, and most funny programming error I've encountered (outside of FIRST, but we were working in C/C++).
My freshman year, I took an introductory computer science class, and our final project was to design and code a remake of Tetris. We've been working on this project for a little while and it seems as if all the major flaws (that we found) were out of the code. Our team leader maintains this Windows independence, and will only work on his laptop, or, if he has to, in notepad (since MS Visual Studio is "evil" in his eyes). We finish work on the code, and GUI, compile everything, and...it doesn't work.
Try again...
...And it still doesn't work...
...We decide to each look over our parts of the code since the error messages were being less than helpful in figuring out why the code wasn't working...
...Try again...
...Yet another failure...
...Our experienced programmer gives up, calls it a day and checks in the code. I check it out for the rest of the team to work on for a little bit, open MS Visual Studio...
...And it immediately highlights the little " /* " at the top of the page that the senior team member forgot to delete when he took out comment header that described the beta process we had gone through.


We had inadvertently, commented out our declarations and main() since the next instance of a " */ " was below the code. We had used // comments everywhere else.


Proving that notepad, while incredibly useful, is not always the best program to use.