[Plugin: WordPress Mobile Pack] transcoder bug with an htaccess login security

hi,
I encounter a big problem : wmp transcoder does not work with a website closed by an htaccess login/pwd. And that is very annoying.

Transcoded image url isn’t correct, the image extension is missing : http://domain.name/wp-content/plugins/wordpress-mobile-pack/plugins/wpmp_transcoder/c/4e78d8ec18d0ba6f76b3bd49f6edb9e3.124.80.

In the transcoder/c folder I’ve only two files :
4e78d8ec18d0ba6f76b3bd49f6edb9e3 and 4e78d8ec18d0ba6f76b3bd49f6edb9e3.meta
the
4e78d8ec18d0ba6f76b3bd49f6edb9e3.124.80.jpg file is missing

4e78d8ec18d0ba6f76b3bd49f6edb9e3 contains a 401 error html code, instead of a gd-jpeg datas, and 4e78d8ec18d0ba6f76b3bd49f6edb9e3.meta the following php code <?php $width=”;$height=”;$type=”; ?> instead of <?php $width=’300′;$height=’194′;$type=’jpg’; ?>

If you have any idea to correct this,
out of “turn off the login/pwd security”,
you’re welcome…

http://wordpress.org/extend/plugins/wordpress-mobile-pack/