I share Klaus's concern.
In my opinion locating breakpoints (and bookmarks if possible) are more important than compiler warnings. A marker which tells me that a variable is not assigned a value is something I don't really need to know most of the time.
in 5.0#4 the only option dealing with breakpoints is [Edit > Remove all breakpoints]
If they aren't going to be highlit on the border then can't we at least have a way of finding the next one?