the installation guide says that this firmware is just to correct some bugs on "tv out", and, if your player hasn´t any problem, so you doesn´t need of that.
I had installed because I want to change the font (I´m using the iriver one), and I didn´t detect any big change about the firmware. the old bugs are there and, the new upgrade tool didn´t work on win 7 (as I expected). The tool which came with the img file didn´t work on my XP computer, so, I use another tool from the bbs.imp3.net forum which says it is from RAmos. (link to download: http://www.rayfile.com/zh-cn/files/440b ... 4221b798a/
The steps to upgrade is the same as other rockchip, open the software, load the img file, plug the device, "switch" the mode, and, if the pc discover the player, the upgrade will be automatic.
One thing that I notice was that the files on the flash still there after upgrade the firmware.
I´ll post some pictures with iriver font.