Wordpress Problem

I've missed 10 days by an error neither which explain in previous post. Now I've found the ways to solved it below:

• Check your javascripts code, it may be the cause if the website contains the .js files compressed, decode it then try again.
• In some cases, the visual editor cause errors, disable it via profile page. May be your plugins also make this happen, you need change to default theme then disable all your plugin installed.
• I've read on the WordPress Support forum then found some answers about it. Add

  define( 'CONCATENATE_SCRIPTS', false );

  to wp-config.php, may be it works well or upload fresh wordpress files again, do not upgrade automatic.

• A few other reasons to think the problem is in the file .htacces, you try to delete it and use wordpress to create this file again.
• You can delete all files in wordpress/wp-includes/js/tinymce folder then upload fresh files in wordpress v2.8, may be it fixed.
• If using Gears, disable it and re-enable it again then clear the browser cache.
• In many discussions in the WordPress Support forum, many people have solved the problem by turning off the plugins using Google API
• The largest cause of the problem is handled HTML of TinyMCE in WordPress, it's my problem, the resolution is simply to switch to use KCKEditor while waiting for this issue is resolved in the next version of WordPress.

Hopefully those who face similar circumstances can solve this problem without loss of time as me