Never make a change to a production site, because a typo will kill you.
I was trying to make a minor change to FOSSwire, missed a comma, and boom!
Sidenote: I'm still working on Xeiso, and will continue to develop it a lot more now that FOSSwire 3 is live. I'm currently working on a Clutter branch backed by dbus, and it's been working very well. If it all works out, there might be a release of it this month.
ooops.. you broke it.
You know....you could always just double check stuff before you save it :)
There's a lot of things I probably should have done, like test it on my local server first. I figured since it was a one-liner that everything would go fine, but alas it did not. :P