This is the raw BB code in your signature now:
Code:
[URL='http://forums.terraria.org/index.php?threads/save-the-jungle-v2.2398/'][SPOILER="Things I support"][SPOILER="Mods"][/SPOILER] [SPOILER="Suggestions"] [IMG]http://forums.terraria.org/index.php?attachments/new_jungle_banner-gif.54902/[/IMG][/URL][/SPOILER][/SPOILER][SPOILER="Things I support"][SPOILER="Suggestions"] [/SPOILER][SPOILER="Texture packs"][URL='http://forums.terraria.org/index.php?threads/terrafine-project-resized-terraria.45303/'][IMG]http://i.imgur.com/K04dY9U.png[/IMG][/URL][/SPOILER][/SPOILER] [URL='http://forums.terraria.org/index.php?threads/save-the-jungle-v2.2398/'][SPOILER="Things I support and were too large for the first spoiler"][SPOILER="Mods"][/SPOILER] [SPOILER="Suggestions"] [/URL][SIZE=3][URL='http://forums.terraria.org/index.php?threads/izzabelles-alternates.42782/']Izzabelle's Alternates[/URL][/SIZE] [URL='https://forums.terraria.org/index.php?threads/archaic-tower-alternate-living-tree.55154/'][IMG]http://i.imgur.com/DNyeSlI.gif[/IMG][/URL] [URL='http://forums.terraria.org/index.php?threads/toad-caves-alternate-spider-nests.13391/'][IMG]http://i.imgur.com/1LuEnfV.gif[/IMG][/URL] [URL='https://forums.terraria.org/index.php?threads/the-necropolis-alternate-desert.56034/'][IMG]http://i.imgur.com/a6MomrL.gif[/IMG][/URL] [URL='http://forums.terraria.org/index.php?threads/the-infestation-alternate-corruption.38347/'][IMG]http://i.imgur.com/rAhQfDF.gif[/IMG][/URL] [URL='http://forums.terraria.org/index.php?threads/vermin-horde-alternate-goblin-army.51203/'][IMG]http://i.imgur.com/0IxrVPY.gif[/IMG][/URL] [URL='http://forums.terraria.org/index.php?threads/fallen-isles-alternate-floating-island.16940/'][IMG]http://i.imgur.com/GZX8x9z.gif[/IMG][/URL] [URL='https://forums.terraria.org/index.php?threads/sky-crystals-alternate-floating-island.55941/'][IMG]http://i.imgur.com/4HmX7d0.gif[/IMG][/URL] [URL='https://forums.terraria.org/index.php?threads/drifting-gardens-alternate-floating-island.55942/'][IMG]http://i.imgur.com/fSd3K6K.gif[/IMG][/URL] [URL='http://forums.terraria.org/index.php?threads/shooting-star-alternate-meteorite.47184/'][IMG]http://i.imgur.com/uKJMQSP.gif[/IMG][/URL] [URL='http://forums.terraria.org/index.php?threads/the-tropics-alternate-jungle.50233/'][IMG]http://i.imgur.com/wwi6QLq.gif[/IMG][/URL] [URL='http://forums.terraria.org/index.php?threads/the-tropics-alternate-jungle.50233/#post-1113855'][IMG]http://i.imgur.com/VN3PWkR.gif[/IMG][/URL] [URL='http://forums.terraria.org/index.php?threads/the-tropics-alternate-jungle.50233/#post-1113857'][IMG]http://i.imgur.com/OLVEWqR.gif[/IMG][/URL] [URL='http://forums.terraria.org/index.php?threads/save-the-jungle-v2.2398/'][IMG]http://i.imgur.com/YRBPCOw.png[/IMG] [IMG]http://i.imgur.com/pTKYPYm.png[/IMG] [/URL][URL='http://forums.terraria.org/index.php?threads/the-river-alternate-underworld.13871/'][IMG]http://i.imgur.com/n0cMrux.gif[/IMG][/URL] [URL='http://forums.terraria.org/index.php?threads/the-whimsy-alternate-hallow.17460/'][IMG]http://i.imgur.com/uv3LVVj.gif[/IMG][/URL] [URL='http://forums.terraria.org/index.php?threads/the-glade-alternate-hallow.45199/'][IMG]http://i.imgur.com/TiiMJFs.gif[/IMG][/URL] [IMG]http://i.imgur.com/VnS9SJy.png[/IMG] [IMG]http://i.imgur.com/TBkuMiY.png[/IMG] [IMG]http://i.imgur.com/SxLzoV0.png[/IMG] [IMG]http://i.imgur.com/mx7nwxN.png[/IMG] [IMG]http://i.imgur.com/4RvJk5A.png[/IMG] [IMG]http://i.imgur.com/xd3Q1LL.png[/IMG] [/SPOILER][/SPOILER][SPOILER="Things I support and were too large for the first spoiler"] [SPOILER="Texture packs"][/SPOILER][/SPOILER] [SPOILER="Sprites for Destroy the Godmodder"][/SPOILER]
You have other tags (like the initial URL) beginning outside, then ending inside your spoilers. That's bound to make them not work correctly.