Possibly a cache or cookie problem, as editing a post works here. You never said which browser you are using.
When at os2world, try pressing CTRL-F5 to fully reload the page. For SeaMonkey, you can go to Tools-->Cookie Manager-->Manage Stored Cookies and delete all the ones from os2world, you will have to relog in. I forget how to clear them in Firefox, you may have to delete all cookies by moving cookies.sqlite out of the way or directly editing the sqlite file, there's a tool on Hobbes.