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It sounds like you're seeing the effects of the red clipping then.
For the pics you have already taken, I suggest:
- First, make absolutely sure that the clipping occurs in your original Jpegs and wasn't caused by a boost to saturation afterwards in any editing you did. If it was caused by your editing, the solution is simple - don't do that.
- If the clipping exists in the original, there are several Photoshop techniques that will work, assuming it's important enough to you to take the time.
- One is to start out by reducing the saturation in the reds 5-10 units to give you some breathing room. Then clone some good red over those problem spots on a new layer that is in the Hue or Color blend mode. Then do a little selective blurring or noise reduction in those areas.
- Another way is to temporarily change the color space to LAB and clone out the offending hue in the B channel. Then apply some selective blurring or noise reduction.
- Lightroom would probably be a little more difficult. You can probably do some selective noise reduction with the adjustment brush but the hue correction is going to be difficult to get right I think.
If you need help with correcting your existing pics, feel free to post an example in the post-processing forum and there are several of us there who can help you out.
Regarding the future, Canon cameras often seem to me to be a little hot in the red/oranges. You might want to try the Neutral picture style if you aren't already. If that drops the saturation too much for your liking, then you may want to try creating a custom picture style or just drop the in-camera saturation a notch as I suggested earlier.