I know new system and new things to get use to. One issue is the image preview, on peakd you can zoom in, the only way I found to get a larger view was to right click open in new window.. Still I do plan on exploring the system.
Edit: I just found you can double click the image opens larger, now to find the comment edit button over there.
I'm still figuring it out too. Where's Clippy when you need him?
It is beta, and I guess we just have to let them know some of the things we can not see, like how to edit comments. I did leave some feed back, and I may get around to trying a post on their site like you did.