Apologies for not knowing what to do here, but I've noticed this when I preview my post or in some RHG's even. The picture, simply won't load for me? I'm using Google Chrome, I'll insert a random image for an example.

The only thing that comes up for me is a little white box and a file looking thing for something that looks like it SHOULD load but doesn't, perhaps it's a setting in my browser? Help would be much appreciated before I incorrectly post my RHG to the page :)

Also sometimes it loads, sometimes it doesn't. Mostly not.

You used "http://imgur.com/gallery/4fVkRQp" Thats not a direct link. You have to use the direct link.
In this case: http://i.imgur.com/4fVkRQp.jpg

See?

Ooooooooooooh okay, uber hackz! lol I got it now, thank you Hidro.

Expanding on what Hidro said, you can identify a direct link if the link ends with the file type (.png, .gif, .mp3, .fla etc). If you can't find a direct link to it, right-click the image and "Copy image URL", this gives you the direct link.