In reply to Scarab:
With regards to the boot glue, the naphthalene might have affected it but hard to believe it managed to affect all the glue so the part/ sole came off totally.
More likely it is a faulty glue anyway. I have had ( and seen on other folks footwear ) soles coming off on older boots.
It almost seems like the glue has an internal clock and self destructs after so long. I don't keep any climbing footwear ( in stock ) any more, especially mountain wear. I would not feel safe on a big hill knowing boots could ( and have ) fallen apart at any time.
Send the boots back as faulty, because they probably are.