There is ever-such-a-slight risk that 1.03.06 has been installed to accommodate a hardware modification - but only very slight.
Update: One user with 1.03.06 supplied has tried to revert to 1.02.32 and found that it rendered his unit unusable... twice. See post 18 onwards. Until 1.03.06 is available for download, it is advisable that owners of 1.03.06 units DO NOT downgrade to 1.02.32 (despite the attractions of the custom firmware, which cannot be issued for 1.03.06 until 1.03.06 is available for inspection in the wild).