This is yet another reason to be annoyed with LiveJournal's administrative staff. There is no stated limit that I found on how many pictures you can have in your ScrapBook, or any gallery within it (mine's organized by taxa, very roughly), and yet suddenly a picture of a small insect can't be uploaded.
You'd have enjoyed it--it's a very cute little critter--but it's not working. And there's no guidance on what to do if that happens. (And no, I do NOT want to upload to an offsite photo service like Flickr....for those who don't know about it, Congress is considering, right now, basically destroying copyright protection for all content creators, so that anyone who wants to use any image or written work of yours they can find, anywhere, is free to consider it "orphaned" and theirs to grab and make money from.)