For some reason, BMW seems content to allow buggy software on their Nav system. My 2001 originally came with v.3.0 (17.0) which had numerous bugs including going to a straight line instead of displaying the radio station frequency numbers at least daily. Versions 4.0 and 4.1 (18.0/18.2) had numerous gliches including being painfully slow, displaying the extraneous "T", etc. Most of the time the Nav display was showing "...generating new map."
The latest, 5.0 (19.0) has several gliches though it corrects some of the problems in 4.1. One new glich that I discovered today is that the scale often reverts to a different scale. If I set it at 125 or 250 yards, the next time the car starts it may be 125 or 250 yards, but just as well may be 450 or 900 yards. So, while I may not have to press "Accept", I do have to check and reprogram the scale numerous times a day.
It is positively shameful that BMW does not pay more attention to the quality of the software on the Nav screen. It would not be acceptable for any of us that run companies, big or small, to release software of this quality and be unwilling to correct it. With a few man (or woman) hours of programmer's time and attention, this could easily be corrected, but as it is, it almost seems to be the quality of a high-school introductory computer software project.
Rick