Dunno why but the forum picture hosting hasn't worked properly for a couple of weeks. Was always pretty poor anyway though.
I must remember to save these instructions somewhere, save me writing them new everytime
Go to
http://postimage.org/ (other hosting sites are available). Click on
browse and select your picture. In the tab below (resize)
select 640x480 for message boards. Click
upload it. When done it will give you a choice of links. You want the 2nd one down
Direct Link. Click
copy to clipboard and it should say
copied in bold.
Back to UKMOC and just above the text box is a little yellow square with mountains and the sun in it, 2nd icon from the right. click that and paste the link into the box. Bingo!