I once owned a Stealth Cam. Mine also worked fine for about a year and then started doing crazy stuff like taking all white photos like the one you posted. Personally, I wouldn't waste my money on another Stealth Cam.
I bought a Bushnell this past December and it has worked flawlessly. I managed to get approx 1500 pictures on a set of 8AA batteries!!!! Not only that, but the majority of those pictures were taken during a cold winter. The temps were down in the single digits at times and were rarely out of the 30s during the day. The pictures are good quality, the trigger speed it great, battery life is incredible, size is tiny compared to the Stealth Cam, and I have yet to have any "bad" pictures. Look into a Bushnell and don't look back.
Best part of all, I paid approx $170 for it.
Send it to Stealth cam. My died and they replaced it. I use the moultrie I40's now and have not had any problems. Go on the web site and you can buy refurbished units at a serious discount.
It is called sun flair from the sun reflecting off something or pointing in the general direction
of the sun unless all of the pictures look the same way.
I have used many brands and they will all do it if not placed properly or have a reflective surface
that can bonce the sun of the lens.
I have two of the small Stealth cams and had to make a small lens hood for them because the
lens is very close to the outside of the housing for wide angle shots.
I just cut a electricians tape spool in half and used a little hot glue to stick it above the lens like
the brim of a hat and it works very good.
If you keep it short 3/8 to 1/2" it does not inter fear with the camera.