If u check your "Options-Advanced Options-Applications" do you only have BlackBerry Maps LBS1.2 or you also have BlackBerry Maps 4.5.x? You should only have the LBS1.2 version.
I had to avoid the 4.5.x version from automatically loading by disconnecting from the internet during the Desktop Manager installation of version LBS1.2.
I have an 8300, would have thot this works for all 83xx models.