When a critical software package your team uses 1) is open source and 2) isn't working quite the way you want or expect it to, patch it so it does! Your team will be more productive and you'll get more -familiarity with how it works, which could pay dividends down the line. +familiarity with how it works, which could pay dividends down the line. It may also signal the depth + of your skills (wink, nudge).