Apple requests all developers to report bugs, regardless of how trivial you may think the issue is. The Apple bug reporting system is Radar
Unfortunately, Radar is a closed system, so the only bugs you can view are those are those you have submitted.
Back in November of 2008, Dave Dribin tweeted:
I’d love to make a public rdar database. I’ve got some ideas on how to implement it. Anyone else interested?
Within about 24 hours this tweet emerged from Tim Burks:
Here’s a quick start using App Engine…
And Open Radar was born.
Dave Dribin describes in more detail the story on how Open Radar evolved.