Hi
The file picker on our Moodle site hangs on the progress bar - this happens in Chrome, IE9, and Firefox when logged in as the site admin. It wasn't working on version 2.1 and upgrading to 2.2 (build 20120119) hasn't solved it. Chrome reports "not loaded: form_filemanager" or "not loaded: form_filepicker" depending on the block.
I've seen the same sort of problem posted (http://moodle.org/mod/forum/discuss.php?d=175696, http://moodle.org/mod/forum/discuss.php?d=193368, http://moodle.org/mod/forum/discuss.php?d=175153, http://moodle.org/mod/forum/discuss.php?d=189540) without any obvious way of resolving the issue.
I guess there's some sort of permission problem - if anyone could point a likely direction in which to start looking it'd be much appreciated.