In my experience with the 50f1.4's, from a Nikkor-S, through the AI versions, they're pretty resistant to flare, when compared to lenses like the 35f2 Nikkor.
APUG: F4, F2AS, F, Nikomat FTn
Nikkors: 18-70/3.5-4.5G AF-S DX (f/D200), 24/2.8 AI, 50/1.4 AI, 85/1.8 K, 180/2.8 ED AIS, 300/4.5 ED AI
- My flickr stream
I have two 50 f1.4, the S series and the latest AIS, both MF of course, and never experienced flare. Even when having the sun in slightly front of the camera. The hood is the answer, especially with such bright lenses.