Further to @AnotherOne's comment here, regarding the Warp Flow transition causing a crash when GPU acceleration is ON (Radeon HD 7850 2GB Pitcairn), I also get the same crash when my Sapphire AMD Radeon HD6970 (Catalyst driver 15.7.1) is ON, whether it's manually adding a Warp Flow transition, or attempting to play a Warp Flow transition created by the Smart Split feature.
Do others with more recent AMD GPUs experience the same crash?
Do others with NVIDIA GPUs experience the same crash?