Water displaying as blocky blue squares on Oregon 450t

[+tavernspite]

Hi,

 

Has anyone got the same problem or know of a solution? I've got the Oregon 450t and also I've put the Talkytoaster maps (UK, taken from OSM) on the SD Card. The maps are great when I'm out in the country, but have an annoying feature when near water. The water displays on the map as large blue blocks and encroaches all over the nearby land. I've attached a screenshot as I've probably made a mess of explaining it!

 

Thanks!

 

[tr_s]

I've had problems with OSM maps for my country as well, such as islands not showing up (but bike paths etc in the middle of the water). Can't complain, it's a freely distributed and mostly fine effort.