You are the only one reporting this, so not sure what exactly to tell you.
Try clearing your memcache (link below), then when the page of unsetting text opens close it and your farm, then clear your browser cache and close your browser. Reopen and try again. If you go back then it should work the first farm and then oops on the rest.
https://apps.facebook.com/farmtown/p...lear_memcached