For those who regulary visits PokerPlanner.org, I posted a bug report on its official blog.
If you don't know what's PokerPlanner.org, this is a website I founded to
find and organize live poker games, whether public or private. I launched it Oct 1st 2009.
So the bug affects the Google Maps Geocoding API. It throws a 400 bad request whenever a JSONP Geocoding request is made and the callback parameter isn't the last in the parameters list. In other words, the callback parameter must be at the very end for the call to work.
We know that a parameter's position in a query string should not be relevant or interfere on how the request is handled.
I filed a bug on Google Issue Tracker and I did an "I apologize" post on PokerPlanner.org's Official Blog regarding this 400 bad request problem with JSONP.
PS. The last articles on DevDays should be available by the end of the week