Just found this when I was doing a simple sum, lol what are the chances of this? I have reported to Apple. Summary: Specific Calculation in calculator causes '0' error. Steps to Reproduce: Open up dashboard calculator. Type 54 - 27 press the '=' nothing happens, press again and it displays '0'. Expected Results: Correct answer. Actual Results: When '=' is pressed, nothing happens, press again and it displays '0'. Regression: Always happens. Notes: I have noticed that this problems occurs EXACTLY the same on the iPhone latest OS as well.