My feed doesn't update, which is fairly regular now. Sometimes it will update after days of not doing it, and it will be like 500 new posts. I usually just hit the Feed but manually to see what's new with my peeps.
As far as the picture thing, I noticed this as well, but ONLY when I upload pictures with a FILTER from my phone to my computer and then try to use that picture as the main one. I get a grey rectangle of shame. Then what I do is go back to the original photo, without the filter and then upload it and it works. Every time. But if I make a post from my cell phone, that doesn't happen and I'm able to upload any photo, filter or no filter.