My current theme has only one sidebar. I installed Atahualpa 3.5.2 and I wanted to use 2 of them. So I enabled the left one. I noticed that al the widgets I had in my only right sidebar in my previous theme were moved to the left sidebar of Atahualpa. Then when I tried to add some widgets to the right one. There's no way to edit my sidebar now. Not only wan't I able to add widgets, but Atahualpa is now uninstalled and now I can't modify my sidebar in any theme. Not even the default one.

I already tried disabling all of my plugins and still nothing, can I get some help? I'd really appreciate it.

Thank you.
http://www.clubpenguinaccess.com

Apparently the changes take effect only after I update a page, or publish a new post... this is really weird.. Anyone's got any ideas?

Check and see if you have wp-supercache or wp-cache plugin active, that will cause this symptom

Thank you for the reply. I currently only have the WP-Cache plugin. But the problem persists even when it is inactive. I once had the "Super Cache" and I had a LOT of problems with it so I uninstalled it, but some files still remain on my server, do you think those could be causing the problem? And are they safe to remove?

Thanks a lot!

If you have deactivated and removed the plugin, I would think you could get rid of any left over files. I would back them up first, just in case...

You could check the plugins forum to see if there is any help there