Okay, I used Ravenswood Joomla server to create a fresh installation of joomla, then installed CB, then installed the Avatar Matrix...it all went okay.
I then looked at file destinations for the files included in the zip and mentioned in the XML:
<files>
<filename module="mod_avatar_matrix5">mod_avatar_matrix5.php</filename>
<filename>avatar_matrix/slimbox.js</filename>
<filename>avatar_matrix/loading.gif</filename>
<filename>avatar_matrix/nextlabel.gif</filename>
<filename>avatar_matrix/prevlabel.gif</filename>
<filename>avatar_matrix/slimbox.css</filename>
<filename>avatar_matrix/mootools.v1.00.js</filename>
<filename>avatar_matrix/closelabel.gif</filename>
</files>
I thought perhaps there was a typo that mentioned putting some nonexistent file in the media directory...but it looks okay...the files all ended up where they should.
I then searched for occurences of "media" in the PHP code and found that line 308 reads:
$Accumulator .= "<link rel='stylesheet' href='$mosConfig_live_site/modules/avatar_matrix/slimbox.css' type='text/css' media='screen' />" . "\n";
And that's it... But it doesn't make sense to me why this should have anything to do with installation. You're having problems just installing. Running the code hasn't happened yet...
None of the beta testers reported this, but admittedly, that wasn't many people. So at the moment, it's a mystery. Any other clues?
Raj