I just had my dealer update my iDrive software yesterday, even though when I talked to them on the phone they said that they wouldnt do it unless there was a specific bulletin on the vehicle (which there isnt).
However, they should update it if you tell them you're not seeing the arrow display in your small nav window. Here's the SIB you can reference:
SI B 61 03 05
General Electrical Systems March 2007
This Service Information bulletin supersedes S.I. B61 03 05 dated December 2006.
designates changes to this revision
Software Errors Corrected with Progman
E90, E91, E92 E93 (3 Series)
Vehicles produced up to February 28, 2007
Customer may complain of the following:
The following software errors were corrected with the release of Progman 25.00.00 (Target data Status E89x-07-03-515).
If there is an incoming telephone call while SVS (Voice Input System) is active
CCC: Navigation system pop-up arrow display missing. Refer to SI B84 61 06.
For all vehicles, on a customer complaint basis only, refer to the following procedure and warranty information.
Update the complete vehicle per SI B09 05 01 (Coding, Individualization, Programming) Procedure B, using Progman 25.00.00 ( Target Data Status E89x-07-03-515) or higher.
Covered under the terms of the BMW New Vehicle Limited Warranty.
Refer to KSD
Retired: '00 e46 (5mt)
Current: '07 e92 (6mt)
Next: F10 or F30?