I did the update and my SD card reader works fine.
Jacko15: If I could ask, how are you making use of your SD card reader? Is your music organized into folders, or are you using playlists? My music is organized into folders, but I also use playlists as a workaround to the fact that you cannot use "shuffle" within a folder. So, on the SD card, there are folders, labeled "01-Jazz", "02-Rock" and so on. There are also corresponding playlists (m3U files) labeled the same way. I can select "playlist", then "01-Jazz" and it will show the playlist and I can either play it in order or use shuffle.
Pre-update, everything worked as advertised. Post-update, when I start the vehicle, IF I have selected a folder and not a playlist, then the song count that shows is the total song count on the SD card, which should be 1964 in my case. But, it is usually off by a couple hundred songs, and the number varies. Most of the time, I have to eject and reinsert the SD card one or more times to get it to accurately reflect 1964 songs. Also, post-update, playlists are not typically loaded when I start the vehicle and I have to do the same eject/re-insertion to get them to show up.
If you are not using playlists and only folders, then you may not see any problems. I would ask you also to check the song count on your SD card versus what you see on the display a couple of times when you start your vehicle. I'd be interested to see if yours reads/loads correctly repeatedly.
Thanks and have a good day.