WordPress 2.3.2 Cookie Error

I installed two new sites with fresh versions of WordPress 2.3.2. Unfortunately I cannot login because of the now-infamous cookie error:

ERROR: WordPress requires Cookies but your browser does not support them or they are blocked.

I am using the newest versions of Firefox and Internet Explorer, with the same results.

I cannot believe that a suitable fix has not been issued for this problem. Does anybody know how to fix this yet???

I have another site that has been upgraded to WordPress 2.3.2, but its login has been unaffected by this error …. just the new ones.