Massive apologies from me, but the host (Photobucket) that I've been using for over ten years to host many images and graphics, including many of the graphics for this forum) has decided, in their wisdom(!) that they'd like to charge their users an exorbitant fee for the privilege of using them as a host, and aren't letting some work until I pay up.
I'm definitely not going to do that, and instead I'm going to find a new host and move things there, but as I have thousands of images, this may take some time so please bear with me! This is definitely not how I thought I'd be spending my day today... >.<
So far it's only affected the additional forum skins I've made and the default version is absolutely fine so I'd recommend you go into your profile and change to that until I've got things sorted out. Sorry again! D: