Boris, Sorry go off topic (and you're very busy!) but I never did mange to resolve my sun problem
Since I upgrade from a gtx 680 to a 780 I've had this issue: with 326.19 beta Nvidia drivers but same since earliest supported on 780 (320.18)
ENB v0.168 - sunsprite, godrays and sun intensity work but shine through everything (bfloatpointrendertarget=1)

ENB v0.201 (but same from v0.171 onwards) - sunintesity setting does not work looks same at 0 or 10, no sunsprite or godrays

Vanilla just for reference

I'm using K ENB Extensive preset but does the same with default ENB settings and files
I know you've done a fix for this but doesn't work for me have tried different sun textures too. Looks like its a driver issue with my card series. Don't know if it is fixable a via ENB but would be very grateful if you're able to look at what changed in 0.171?
MANY THANKS
i7 3770k @4.1hz, 8gb Corsair RAM, 3GB EVGA GTX 780 SC+ACX Cooler, OCZ Agility 240gb SSD, Windows 7 64-bit