Map tiles not updating on default client

[Jalpha]

I've been toying with the default client. It's nice to see a map has been added to display stored map tiles. The problem I am experiencing is that the default client does not update these tiles in real time all of the time. Sometimes it decides not to display newly added tiles until after the client has been restarted.

Fairly annoying when trying to locate landmarks and identify your position on the map or map out a new area you have settled.