There is a lot of arm chair sysadmining going on, but remember, the team that built Dribbble is essentially 4 total people, 2.5 engineers, working with no outside funding. The fact that they've built the designer's equivalent of Github and keep it running as smoothly as it does is amazing. It's fine to provide suggestions, but this is a minor blip in an otherwise impeccable record of performance.
If there's one social norm I'd love for HN, it would be "If you build things, we're on your side." (I hope that the normative intent of this is clear enough to not require 2 paragraphs of inoculations against nitpickery. On second thought, if there were two social norms I'd like for HN, that plus "Default to not nitpicking.")
On the bright side, looking to the quality comments here is a great way to learn constructive criticism (as well as learn about a variety of other topics too).