After moving importing my post from Blogger (blogspot) I changed my permalink to /%year%/%monthnum%/%day%/%postname%/
Cause it will redirect my blogspot indexed pages to my new blog address . And i would not loose traffic.
But i got 404 error clicking any imported post. Its a mod_rewrite problem.Wordpress have an easy fix for that. You can install some plugin to fix that problem.
Here is the plugin..
mg404Rewrite : Download this plugin Here
This plugin will fix permalinks without mod_rewrite.
Activate this plugin and happy blogging..
Edit: you can also edit your .htaccess to fix this problem here is the code:
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule># END WordPress