Halo in image

I just posted this image in the macro gallery and a comment was made about a halo around part of the image. I admit ignorance as to what causes this and am looking for some direction to prevent this in the future. PP was in LR2 and sizing was in CS3. Any help? Thanks in advance.

Jeff

There is a slight halo around the flower spathe. I don't use Lightroom, but this can be happen in ACR when applying the Clarity slider. Don't know if Lightroom has the same slider, but if it does, backing the slider back down a bit can help reduce the halo.

Hope this helps

BTW, I don't find the halo particularly noticeable or objectionable, and it's a sweet picture.

Jeff, Im assuming the halo they were talking about was the brighter area against the bg that surrounds the flower, since i dont see any other 'haloes'. Its next to impossible to diagnose the causes based on looking at a jpeg post, but one possible cause is if you made some adjustment to the curve (brightening the flower or darkening the bg) this might show up as jpeg banding in the resized photo. The best bet is for you to try to diagnose the source yourself: was the photo shot as a RAW digital capture, and if so, does the "halo" appear in the original? If not, then just backtrack in your PP workflow until the problem appears, if you feel it is a problem.
EDIT: yeah, i just saw Buck's response and i agree, its not really a big deal here. Any adjustment to contrast, as Buck mentioned, could result in something like this.

Thanks for the ideas, yes Buck, LR does have a clarity slider and I do have it up there a bit, I will try your suggestion. I did shoot this as RAW and JPEG and it isn't in the RAW file so I believe that Buck has probably diagnosed this correctly. This forum is always a great place for help and ideas-Thanks again.