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[nanouk76]

Thanks for your quick response, it's really much appreciated and no need to be sorry, mistakes and typos are part of human nature, right?
Now, I was not totally convinced that the cache had really been purged so I closed and restarted Firefox and, lo and behold, now the frame is functional again. I-am-stumped! Seems so  illogical at face value but I guess there is a reason for everything... Well, I am not one to peruse logs so I am happy as it is. Thanks a bunch again. My bad if I made you waste precious real life moments.