I have always used BlackBerry Link to do a full backup and restore before installing the latest leak. So far the only issue I had was losing my BBM chats.
I have just upgraded to 10.3.0 1130 and used the latest version of link.
Everything restored perfectly except the chats again. So the day after the upgrade and restore I went into link, used the advanced options to drill down to restore just BBM. After the reboot all my chats were back.
Zed10 + 4500mAh Fat Battery + Tempered Glass Screen Protector + 10.3.0.xxxx = Awesome! Everything you need to get 48 hours of battery life.
http://forums.crackberry.com/blackbe...ml#post8588314