Mine were fine too, until about a fortnight ago! I have just cut off the worst affected leaves and exposed the fruits to the sun to help ripen them. I've also cut back any long trailing stems to the last 'decent' fruit to focus energy on the main ones. I have already 'harvested' one fruit (I accidentally broke it off!) - it is slightly smaller than I would like but was perfectly okay for roasting. I'll keep feeding and watering the rest and hopefully they'll keep growing until I'm ready for them! Oh, the squash I 'harvested' was an Uchiki Kuri, but I have 'Polar Bear' and 'Crown Prince' too - I treated them all the same and they are still growing okay :-)