Several years ago I spent a few hours implementing a feature in Mozilla, and then probably 10 times that amount of time dealing with the hassle of getting my code (which I was trying to give them for free) approved and into their sources. The incident left a bitter aftertaste.
Fast forward to present day. I was just reading through some WebKit sources and noticed a typo in one of the comments. So I decided to fix the typo and submit a patch to see how painful the process is for the competing project.
Picky? Sure. But why not?
Update: patch approved after 5 hours.