Could it be that the aperture is worn out? In other words, letting too much light in? I'm not sure that's something worth repairing....perhaps a new camera is in order!

Amanda

It doesn't sound as though you have a problem with equipment. A failing memory card would give errors on your screen instead of photos A faulty camera would also give other errors.

 It actually seems like a white balance problem. The camera's auto white balance doesn't work in all situations. In the case of autumn pictures, possibly the sky was overcast too, this is a common case. Do you have other settings for white balance ? If so, try using the "cloudy" setting, that will warm up all the colours, or even the "shade" setting, which will warm them up even more. A little extra exposure would help too, try setting exposure compensation to +1

Regards

Brian