The jerkiness problem with motion is not fixed, even in 2519. Slideshow motion is not useable in Powerdirector from my perspective.
For a work around I used Microsoft Photo 3 to add the motion effects and re-import that back into PowerDirector.
Win8 64-bit Pro Retail
Intel i7-4770
16GB DDR3 1600 8-8-8-24
MSI Z87-G45 Motherboard
ASUS GTX 660 Direct CU II OC 2GB GPU
1 TB RAID 1 (mirrored) Drive Array
Several scratch drives for video, TMP, pagefile.