Yeah, it's supposedly a limitation in the mod tools. Avatar links are allowed to be X-characters long, but it's less with the mod tools (I wouldn't know the exact numbers). So if you have a long link, you probably have to fix it after a mod saves any changes to your account.
Ice Cold is talking about the Canucks, Vancouver's NHL hockey team. Their logo is his avatar. He shortened it to 'Nucks, and says that Reggie loves them.