If you're talking about tutorials posted on sc2mapster, they may have just made the tutorial before the wiki overhaul which changed how you have to type in a link. For example, it used to be something like http://forums.sc2mapster.com/resources/tutorials. and they changed it to http://www.sc2mapster.com/forums/resources/tutorials. So if you haven't logged in and changed it, the image will not work. I know I did this for a lot of links.
If you're talking about tutorials posted on sc2mapster, they may have just made the tutorial before the wiki overhaul which changed how you have to type in a link. For example, it used to be something like http://forums.sc2mapster.com/resources/tutorials. and they changed it to http://www.sc2mapster.com/forums/resources/tutorials. So if you haven't logged in and changed it, the image will not work. I know I did this for a lot of links.
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