Hi, I am new and have been resourceful, or stubborn, enough to solve my own issues until now.
A few other people have posted similar problems, but usually related to specific browsers. My sidebar jumps down on archive pages only.
It does not seem related to one post but to the archive.php.
I am using the theme red is nice and did not alter the archive file. See http://www.pawinepicks.com.
Any help appreciated. Thanks.