Per Samsung on facebook:
Please see the list below for details of some changes found in the DI07 update.
Optimized, HotSpot in 3G idle mode to help conserve battery power
Optimized, Applied Qualcomm patch for performance enhancement
Added, Media Hub
Modified, WiMAX exit delay
Modified, UI "Noisey" One to "Noisy One"
Fixed, 32GB mSD card is not recongized when formatted in device
Fixed, When playing video, the playback is paused if a headset is connected/disconnected
Fixed, Sorry popup when DRM file is selected in the Gallery
Fixed, Hotspot registration/deregistration