nuvi 37xx (GCD File) software version 4.50
Changes made from version 4.30 to 4.50:
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Added the ability to import .GPX route files for use in Trip Planner.
Improved the data transfer speed from a PC to the device SD card over a USB cable.
Fixed a WebUpdater error that caused incomplete software updates to be reported as complete.
Fixed an error that caused the device not to exit sleep mode properly.
Fixed an error that affected route calculation with 2011.10 maps.
Fixed a Trip Planner routing error.
Fixed an error the caused the German voice to skip while giving directions.
Fixed an error that caused the World Clock to display a future date.
Fixed an error that caused the QWERTY keyboard to appear when the numeric keyboard should have appeared.
Set device to switch to night mode while in tunnels.
Brightness now changes gradually between day and night in ?Auto? mode.