SanDisk Clip Sport Firmware 1.27 released

" Improved Compatibility with some micro-SD cards (Fix the 24MHz Clock in High Speed Mode)"

What does this mean??? Does it mean that class 10 Sandisk micro SDHC cards will now be supported without issues? It is annoying having to buy class 4 cards for the player which not only load much slower than class 10 ones, but are now often more expensive than class 10 cards. I am wondering if the availability of class 4 cards will start diminishing. It would be nice if micro SDXC support is added, so the cards don’t need to be formatted as FAT32, and the class 10 speed doesn’t cause issues. 

Will any effort be made to try to enlarge the maximum size of the card database, or to include an option so that one could have a 4,000 song database limit for card memory, even if it means sacrificing the internal memory database?