All pages return 'Not Found' with /null URL after activating plugin.

Hi,

After activating a plugin every page, user and admin, displays the content 'Not found' and the URL is always sitename.com/null All the sidebars,header and footer are displayed correctly. Visiting any page/link re-directs back to /null

Deactivating the plugin restores normal operation.

The plugin in question is, http://wordpress.org/extend/plugins/...racing-league/

I am the author of the plugin and have determined, with help from the user, sdjukic, that after changing to the default theme my plugin activates and the site works OK.

Changing back to atahualpa we found that after commenting out the action 'wp_print_scripts' in my plugin then everything works OK. The action for wp_print_scripts just calls wp_enqueue_script with the name of a fairly simple Javascript file, using SACK, to validate user input.

I have installed the atahualpa theme, same version 3.4.2 and all the users other plugins on my test server and do not have a problem. I haven't applied all the same theme/plugin settings are there are so many.

I have spent hours and hours trying to fix this, and I'm not blaming this theme, I would just like to find out why this is happening.

Any help would be appreciated, as this user, sdjukic, who has donated to alahulpa, would like to use my plugin and and I would like to ensure that other users do not have a problem.

Apologies for duplicate post in http://wordpress.org/support/topic/3...2#post-1208026 as sdjukic mentioned this forum after I posted.

Thanks,

Ian.