Before you post shots, you should always check your topic, press the "preview" button when your about to post to make sure the images are there. It may be that you spaced something in the URL in the [img] brackets. Here's what i mean:

Image appears fine
[img] %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20 %20http://www.simviation.com/yabbuploads/Ju88_shot_03[/img]
Oops, spaced the URL, image doesn't show.
You see, it's usually just stupid little details such as this that casue the images not to display.
Hope this helps