Google Caching Wrong Homepage

I have a blogger site, illusionsetc.blogspot.com (PR6). Twice in the last week google dropped this page from being cached and cached www.illusionsetc.blogspot.com (PR4).

The main problem with this is when this happens I drop from 15 in google for "optical illusions" to off the chart. I still sit as #1 in MSN and #5 in Yahoo.

The url with www in front shouldn't exist, how do I go about correcting this?

 

I don't know if blogspot allows a .htaccess file or not, but if so, put this in it:

RewriteEngine on
Options +FollowSymLinks
<IfModule mod_rewrite.c>
RewriteCond %{HTTP_HOST} .
RewriteCond %{HTTP_HOST} !^illusionsetc\.blogspot\.com [NC]
RewriteRule ^(.*) http://illusionsetc.blogspot.com/$1 [R=301,L]
</IfModule>

Code (markup):

I think that will work for you. Try accessing the www version after adding that.

 

I guess the only option is to find the link and have it changed.
Check and see if it is in your own site first.

 

Since Google owns blogger you'd think the htaccess config would be automatic.

 

I checked backlinks in google for the site that starts with www and I only found one. It is a relatively new site in Germany. I left him a message that hopefully he will understand to remove the www.

I'm optimistic this might be the root cause.

 

Ah yes, I remember optimism... I had some once.