Ok, Here are some tips to avoid having your account hijacked by these noscript kiddies (a.k.a. the ankle bitters of the internet).
DO NOT BROWSE THE FORUM OR HOMEPAGES WHILE LOGGED IN!
Everything these noscript kiddies do is based off of signatures, and as long as you are not logged in while reading the forum posts your account cannot be hijacked, because you ruined the range of action these noscript kiddies have to work with.
If you want to reply to a post, go to the link that follows this paragraph and just change ID to the ID number of the topic you want to reply to. Then when it asks you to login after you went to that link, then you may login, cause again, while in the process of typing out a reply, you are still out of the range of the code that is affecting your account: http://www.netnexus.com/forums/nations/nations.php?function=reply&id=ID
Until the ADMINS fix the bugs in the forum, the previous tips will keep your account from being stolen out from under you. MODS, make sure you follow these tips closely, because your passwords can be changed, and your accounts stolen as you already know.