I upgraded to 2.8.1 and encountered a problem in the admin area. The public part of the Web site seems fine after the transition.
In the admin, I do not have the vertical tool bar on the left with all the options to manage posts, media, links, appearance, pages, etc. There is a space for it, but it does it's not visible.
I can create a new post by selecting "new post' in the menu bar at the top. However, I can not use "screen options" or "help" that is also at the top.
I've reinstalled 2.8.1 twice. I even went "down" to 2.8 to see if that mattered. When I installed the new version, I did not replace my wp-content folder. I haven't seen a theme conflict with the admin side, but could that be it? I also can't turn off my plugins one by one to see which ones might create a conflict. I can access the plugin folder via FTP and remove the all if the consensus is that a plugin can conflict with the admin side of WordPress. I've had plugins conflict with the public part of a WordPress site, but not the admin side.
Before I scrap the plugin folder, does anyone have any other ideas as to what the problem might be? A search of the forum didn't yield similar results, so I'm looking for any insight.