Any question answered...

why are random posted images on Lfgss showing up as this (now including one that I just posted)?

I'm on Chrome with a flash blocker.

Velocio may just have fixed that or been working on it when you tried?

Changed: Images now fit the screen width on modern browsers.

Try viewing Bike Porn, and dragging the edge of the browser window (to resize it horizontally), images should be rescaled to fit the viewable area... and if the screen is big enough will be shown at original size.

I've left in the swapping out of excessively large images with links, because you shouldn't use excessively large images, you should link to them and provide thumbnails instead.