Sometimes it can be finnigy — the wordpress flash uploader. When it works, it works nicely, but when it doesn't work it can be frustrating to troubleshoot and fix. If you ever decide that you don't want it anymore, there is a very simple snippet that will make it look like wordpress never had a flash uploader at all, and all you see is the html uploader. Create a plugin, add these two lines of code to it, and activate it.
<?php
// Disable the flash uploader
add_action('flash_uploader', 'disableFlashUploader');
function disableFlashUploader(){return false;}
?>
