We are now having the same problem. I'm sorry to see you've had no reply. 
 
We have just undergone a major overhaul of our joomla powered site. Version 
Joomla! 1.0.10 Stable
We have applied a new template from 
http://www.joomlashack.com/
Next we installed an extended menu module from 
http://de.siteof.de/extended-menu.html
Then we uninstalled the old non-working OpenSEF component and installed a new one from this site: 
http://www.artio.cz/ ARTIO JoomSEF v1.3.3 
 
The site is working well, but we now have the following 
three issues that must be fixed somehow. 
 
1.      Guest users are now getting an error such as “
You are not authorized to view this resource. You need to login.†when trying to view articles from two sections, but not the third section, which works as it is supposed to. The permissions are all set to public on everything across the board.
 
2.      There is an annoying search box just under the top menu. I would like to get rid of it because it is not necessary to have two search boxes. 
3.      When a user clicks on the top most menu item (the catagory) itself, the displayed articles comes up in TWO columns instead of ONE as it should. 
 
If anyone would please visit our site and tell us what you think about these issues we would greatly appreciate your input. I have been a joomla admin for  over a year now but for the life of me, I can't figure these three issues out. 
See our site here: 
Http://www.frugalbrothers.com
 
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We made similar requests for help here:
www.joomlahacks.com/component/option,com...emid,94/topic,3268.0
http://www.joomlaya.com/forums/showthread.php?t=5793