jdMorgan - 5:29 pm on Oct 3, 2009 (gmt 0)

[QSA] is only needed if the RewriteRule substitution contains a query string *and* you wish to *append* that new query-string to any existing query string which was attached to the originally-requested URL-path.

In the absence of any query string in the RewriteRule substitution, any query string attached to the originally-requested URL-path will be passed through the RewriteRule unchanged by default.

Jim