"%20"?

[Card Ruler]

I was making a joke card for a friend. When I did, it appeared as:
[url]http://forum.yugiohcardmaker.net/ycmaker/createcard.php?name=I%20see%20what%20you%20did%20there&cardtype=Spell&subtype=normal&attribute=Light&level=1&magictraptype=Counter&rarity=Common&picture=http://images1.memegenerator.net/ImageMacro/4272860/I-see-what-you-did-there.jpg?imageSize=Medium&set1=4f524&set2=43tfr&inset=false&type=&description=When%20you%20see%20your%20opponent%20do%20something%2C%20do%20the%20exact%20same%20thing.&circulation=None&atk=&def=&creator=Joke&year=2011&serial=04618263[/url]
This also wont appear as an image in preview of this post.
Fix your HTML.
And no, I'm not doing it wrong.

[Wahrheit]

It's html for space. Make it again, it shouldn't happen. It's also likely that this is a temporary issue due to the current database transferral.

[Sweetie Belle]

20 is hexadecimal for space. Placing % in front of it allows HTML to recognize it. And you ARE doing it wrong. Image Codes for cards should appear as such:
[code][img]http://img717.imageshack.us/img717/4110/176933u.jpg[/img][/code]
as opposed to:
[code][img]http://www.yugiohcardmaker.net/ycmaker/createcard.php?name=Blue%20Screen%20of%20Death&cardtype=Spell&subtype=normal&attribute=Light&level=1&magictraptype=None&rarity=Ultra%20Rare&picture=http://pcmaccomputerrepair.com/images/blue-screen-of-death1.jpg&set1=WNDW&set2=EN000&inset=false&type=&description=Activate%20only%20if%20your%20opponent%20owns%20a%20computer%20with%20a%20Windows%20Operating%20System.%20Destroy%20it.&circulation=Windows%20Edition&atk=&def=&creator=maximillianpegasus&year=2010&serial=WNDWSSUX[/img][/code]

Also, you don't have image tags, so OF COURSE it won't appear as an image, because BBCode recognises it as a link.