Just figured I would chime in as another who has had freezing issues. Using the official batteries, with the battery grip/without, it will randomly freeze (either in the EVF or the LCD depending on how I was shooting) and require a battery pull. I've been using the Lexar 1000x cards, but have a pair of Transcend 32GB Class 10 SDHC UHS-II on order to try them out and see how it goes. I e-mailed Fuji on Saturday and just heard back today, asking me to call the 1-800 number, which I will do when I return home from work.
Hopefully something that can be sorted out in Firmware, as I otherwise love the new body, and can't wait to get out to Carmel next month to shoot for a while with it.