I got a fix for the Media Manager bug. You have to hack mediamgr.php and the latest sef_ext.php (0.14 Alpha) to do it. The hack is based on zOOm Gallery 2.5.1 RC3.
Around line 80 find this:
<form enctype="multipart/form-data" name="catselect" method="post" action="<?php
if ($zoom->_isBackend) {
echo "index2.php?option=com_zoom&page=mediamgr&catid=$catid&Itemid=$Itemid";
}
else {
echo sefRelToAbs("index.php?option=com_zoom&page=mediamgr&Itemid=$Itemid");
}
?>">
Replace with this:
<form enctype="multipart/form-data" name="catselect" method="post" action="<?php
if ($zoom->_isBackend) {
echo "index2.php?option=com_zoom&page=mediamgr&catid=$catid&Itemid=$Itemid";
}
else {
// echo sefRelToAbs("index.php?option=com_zoom&page=mediamgr&Itemid=$Itemid");
echo "index.php?option=com_zoom&page=mediamgr&Itemid=$Itemid";
//DD122006
}
?>">
Note there's only one line you need to change but I left the rest for context.