I get this error when trying to login on one account:

You appear to have logged in successfully, however a cookie has not been set. Please check your settings and if applicable, enable cookies for this website.

When I login as another user, I do not get the error using the same machine/browser. Hints? Thoughts?

Thank you for the quick instructions. The upgrade performed without error.

Thanks, thread had 300 page views. Sorry.

anyone? anything?

Ive taken over a site that is still running 1.2.17.  It looks antiquated and Id like to upgrade using the existing user info, accounts, etc.  Can someone point me in the right direction?