SimpleMap has some embedded javascript in the simplemap.php that is probably causing this. Around line 1344 of simplemap.php you’ll see this:
window.location = '#map_top';
Comment that out, so it looks like this:
// window.location = '#map_top';
And it should stop doing that. I’ve been meaning to send a support ticket in on this, but now that the ownership has changed and there’s no explicit support link, I’m not sure what to do about that.
If you using a custom theme? I’ve seen this where a .hover class in my custom theme’s stylesheet messes with the adminbar, which also uses the hover class.
