Yeps - same. I wouldn't worry too much about that, if it's only on a few plants. If all plants were like that you would have had a general problem. On one plant i would do nothing but not grow that strain/phenotype anymore and keep grow the ones that really grow nicely.
Those spots could have been caused by: ph-unbalance for a period, cold, lack of micro nutrients (what is causing the spots - cold and unbalanced ph causes a lack)