I just updated find my iPhone-new phone icons etc. unfortunately since the update all location accuracy is gone. Big green dot where it used to be small. And I mean big like several blocks

Hello taostypie,

We've an article that provides some useful information regarding issues such as this with Find My iPhone.

iCloud: Troubleshooting Find My iPhone, iPad, iPod touch, or Mac

http://support.apple.com/kb/TS4006

Cheers,

Allen

That apple site doesn't address this, I'm having the same problem. Before the update, a device was shown on the map with a name labeling a little dot. You could tap the label and it would go away do that you could see the dot more easily. Now instead of the little dot, there's a giant picture of the device (better hope none of your devices look the same or you can't tell them apart) and the picture won't disappear when you tap it so that you can see where the device is. All you can see is the huge picture obscuring the map.