Flash trigger maker PocketWizard has released beta firmware version 3.707, which makes the ControlTL TTL triggering system compatible with the new Nikon D750 DSLR and Speedlight SB-500 flashgun. The update also fixes a bug with the SpeedCycler sequential flash firing mode.
The release bulletin is published on the PocketWizard web site here. You can add the firmware using the USB ports on your MiniTT1 and FlexTT5 remotes. Visit pocketwizard.com for more information.