I am finding that whenever I apply an effect to the time line I get a PD11 crash, program closes down and requests to send report to CL.
I have found that if I untick in Hardware Acceleration the 'enable OpenCL' this problem does not occur again, this problem may only be for nVidia cards I do get a flash before the crash advising 'low system memory' as I have 12Gb I doubt this!
Hopes this helps and save a bit of time, took me half a day to find out the work around
Windows 7 X64 SP1
ASUS P6X58D Premium LGA1366 X58
Intel core I7 950 3.80 GHZ CPU
12Gb Corsair TR3X3G1600C8D Tri channel
Corsair H70 Water cooling
Corsair HX1000W PSU
nVidia GTX 980
Intel 240Gb SSD 520 Series
2 x Seagate 1 Tb