All,
I've just promoted version 4.09 to production, I recommend you update your units to this version.  It fixes the following bugs which were found in 4.07:
 - Fixed bug: Unable to load some GPX files
 - Fixed bug: METAR mode would get confused if there was no data file loaded
 - Fixed bug: When in "True North" mode, flight plan always had 123 deg for all segments
 - Fixed bug: On the flight plan page touching "Save As", then "Cancel", the flight plan would still be saved
 - Fixed bug: Nearest Airport dialog was excluding private airports
 - Fixed bug: Touching a private airport on the map would not display airport information
 - Fixed bug: In certain situations, the buttons would fade out and not return
 - Change: Improved memory management and performance when doing a lot of panning/zooming
 - Change: Airport text in Vector Night mode is now white (instead of black)
 - Fixed bug: Not showing nearest airports correctly
 
There are two known issues with this release:
1) TFR's show up for too long past their expiration date (specifically up to , 36 hours past expiration),
2) Very sporadically a popup marker will get "stuck" and not go away.  (Extremely difficult to reproduce; I've had one report of this, and I've seen it once myself.  If you see this please let me know - will help me judge how serious this problem is)
Thanks!
Walter