My personal favorite is an old iOS bug that I ended up going through a super-convoluted process to report and that they finally fixed. The bug was extremely si

My personal favorite is an old iOS bug that I ended up going through a super-convoluted process to report and that they finally fixed. The bug was extremely simple: the calculator app would ignore the decimal point depending on whether the phone was held vertically or horizontally. Steps to reproduce: 1. Open the calculator application 2. Ensure the app is held vertically (non-scientific mode) 3. Enter a number such as 10,000,000 4. Attempt to make the number 10,000,000.1 by pressing "." and "1" 5. Notice that instead of this number, the calculator application converts the input to 100,000,001 - i.e. the decimal point was ignored. I wouldn’t have minded, except I only discovered the bug during a finance final in grad school, and It took me three attempts before thinking “maybe the calculator is wrong”... Bug id 6743558 for posterity :)