In my C++ class, I wrote a program. I debugged it and everything worked fine. I was about to submit it but had the bright idea of testing it. It didn't run. I checked the code, compiled it again, debugged it again, and basicly did everything I could think of to get it to work. Nothing helped. The problem would only show up when I ran the exe file. After a week I found the problem: The exe file refered to a xml file. I had the folder with the assignment, inside of that was a folder and the exe file. Inside of the folder was everything else (cpp files, xml file, etc). The reason it would work in the debugger was the xml file was in that folder but I failed to realize that I would also need to have the xml file in the same folder as the exe file for it to work.
I once took a Digital Photography and Graphics class. It should have been called "introduction to Gimp". I spent 5 hours on an assignment. I finished it and Gimp crashed. I thus lost all of my work. I then spent almost a full hour looking for the backup before realizing that unlike MS Word, Gimp does not autosave.
I just tried to open a file on my computer because it contained information on a really stupid mistake I recently made on my computer. I actentally opened the wrong file (didn't see the lnk file ending), and somehow messed up a bunch of settings. My computer now believes that it is supposed to open all lnk files on my computer with Notepad.