Firmware Removed by Garmin on 23-may:

nuvi 24x5 and 25x5 v6.40
nuvi 34xx v6.40
nuvi 35xx v6.40
nuvi 40 and 50 v2.50 + v2.40 [2 steps backward ??]


They all had:
-Improved map and content transfer speeds.
-Improved software stability.