[mkgmap-dev] Problem sending maps to device with latest versions of BaseCamp

Hi all In the last two months or so I have received several complains from users of my maps reporting when they send map to device via BaseCamp, although process is completed successfully, map is not loaded in device or only partially. 4.6.2 seems to be last version sending maps correctly. Is it a bug in BaseCamp (or something intended by Garmin) or may be a problem in mkgmap generated maps?