POST IN activity generates 404 on edit-account??

Hi
Hope someone can help here. I get plenty of 404. I could reproduce it. Here is how:

I make a post in mysite/activity… (with no attachment !!) – using buddypress

when debugging I see that after the post, “wp-includes/class_wp_rewrite.php” adds this rule :

[^/]+/([^/]+)/?$ index.php?attachment=$matches[1]

then I paste (or click) to get this url : “…mysite/my-account/edit-account” and it generates a 404 error.

when debugging i find that the urls are being transformed by the above rewrite rule and become:

http://mysite/my-account/edit-account/?attachment=edit-account

which generates a 404   (ALL THE TIME)
???
Can someone help, it happen all the time when doing this sequence !! ps: the line adding the wrong regex in is : “$subquery = $index . ‘?attachment=’ . $this->preg_index(1);”

thanks !
philippe