Folding Forum

Is there a limit to the size of images that can be posted? I'm wondering because sometimes I'll take screenshots and upload them to the forum (well, upload them to ImageShack or a similar service and embed them), but they are quite large. I've seen some people posting whole screenshots, and others posting thumbnails that link to the full size image. Which should I be doing, or does it not matter?

People with slow connections have complained about large images taking a long time to load, so I'd probably stick with a thumbnail/link.

Okay. Thank you.