Windows 10, 64 , 16Gb RAM
AMD Radeon HD 6450
Short description of error
Just updated from 2.77a to 2.78, loaded my project and noticed VSE does not cache at all Node Editor scene strips. 2.77a VSE does cache as long as I check "no sinc" playback.
Exact steps for others to reproduce the error
Create a new scene in Node Editor. Input a movie clip and aply some efects, transforms, tracks, etc.
Load this scene into VSE as scene strip.
Check no sync playback.
Playback the scene for caching.
Playback again. No effect.
If You do this in 2.77a, the second playback is perfectly smooth, it has been cached. (Same settings)