For those of you who are having problems with images showing up in LiveJournal and if you right-click on the image and view the properties and the URL given is not the same URL if you were to edit the post, it's a problem introduced Monday around noon PST. It looks like they are URL Encoding the image links and it's improperly encoding the ?, %, +, and = characters so if you have any special characters in your file name if you're not using a program to serve images, remove them and they should show up. If you're using a program to serve images (like a anti-bot image rip tool), you'll just have to suffer until they fix it. I've notified them via the support channel and so have several others.
-John, suffering
Update: I just received a response from Support.
rahaeli said "This is a bug due to a code change made today, and will be fixed as soon as possible. I apologize for the inconvenience."
I hope they realize it's more than just the characters above. I like to use | characters too. Neya.
Update #2: Looks like they undid whatever they did with the URL's so images now should display again.