rvk,
I work for Geni.. sorry to hear of the difficulties! I suspect the reason why no one else has chimed in here, is because the problem is not very widespread. The normal procedure would be for you to open a support ticket at http://help.geni.com but that'll eventually come back to me (in this case, at least) so let me see if I can just help you right here.
I suspect the problem is that your "cookies" from Geni have grown too large. One of our curators recently reported the same problem, and she's going to help me diagnose exactly where the problem is. In the meantime, I suspect you can resolve the problem (at least temporarily) by clearing your Geni cookies as follows:
1. Log out
2. Visit http://www.geni.com/login/clear_cookies
Give that a try and let me know if it resolves your problem.
Kind regards,
Mike at Geni