OK, so far there are no responses. Does anyone know how to fix this?
Never mind — I tried the second solution (going to wp-incules/vars and changing the “http” in COOKIEPATH to “https”) and that worked.
<i>I ran into a similar problem running off an https server. After trying all the solutions on this page, I found the solution here: http://wordpress.org/support/3/6429 it seems you gotta make sure the cookies are set for https as well</i>
Podz’s solution didn’t work for me, but this one did. I guess my office uses secure HTTP while my home doesn’t.