Hmm yeah, i think i may of ran the dodge brush over the lichen a bit too much i notice the problem with the saturation now.
I seem to be a bit hasty when it comes to processing my images and i tend to rush in to it when i get the shot home and not really think through it too much.
I still have the original in a lyered Tiff file so I'll try to dial down the saturation a bit as it was almost unbeliavably colourfull that night and upload a version when i get home from work.
Thanks for the comments, it helps me fine tune images a bit more when getting feedback like this
.