Remote Content - WordpressComment Redirect

Hi,
We have a Wordpress blog v3.1 set up as a sub folder on a win 2008 server, and we use the remote content asset page to access our wordpress blog via Squiz CMS, and post comments. We upgraded our Squiz CMS from 3.54? to v4.8.3, about 2 months ago. However about 6 weeks ago we got a problem with comment posts not redirecting in remote content asset page. Once the user posts a comment to an article the page gets redirected to the 'remote content' page but we get a 'Content cannot be accessed' notification.



We are are using permalinks numeric setting for generating static type urls and 'allow redirects' connection setting on the remote asset details page.



The squiz error log outputs the following;



(/core/include/locale_manager.inc:547) - Error response 400 from server while attempting to access "http://myremotedomain.com/wp_blog/wp-comments-post.php" [CMS0064]



Using the base64 decode encode functions on the remote asset comment form, sq_content_src & return url, the unencoded return url s/b e.g. +url=http://myremotedomain.com/wp_blog/archives/49#comment-660&all=1, however I get +url=http://myremotedomain.com/wp_blog/wp-comments-post.php&all=1 instead.



Hope someone can give me some pointers.



Cheers.