[Plugin: Ninja Page Categories and Tags] Weird style glitch

I uploaded this plugin to the “/wp-content/plugins/” folder via FTP. I never activated it. When I reloaded my homepage (www.beachedmiami.com) in Google Chrome, the dotted border that usually separates the content area from the right sidebar was gone. I know this is a strange glitch, but it happened immediately after I uploaded this plugin. Stranger still, the border only disappears on pages (as opposed to posts), including the homepage, and only when I’m using Chrome — it shows up everywhere when I load the homepage in Firefox and Safari.

I have since deleted this plugin, but the glitch remains. When you load the page in Chrome, the border does not show up (it does show up in Firefox or Safari).

Does anyone know what is happening and how I can fix it? Thanks in advance.

Helpful Links

At the following URL in Google Chrome, you will see a grey dotted border separating the content area from the sidebar: http://www.beachedmiami.com/2012/06/21/instapix-pic-14/

But if you load any of these URLs in Google Chrome, you will not: http://www.beachedmiami.com, http://www.beachedmiami.com/music-guide, http://www.beachedmiami.com/category/music

http://wordpress.org/extend/plugins/ninja-page-categories-and-tags/