chaz6

I discovered the problem also goes away if I add the line zlib.output_compression = On to php.ini.

Edit: Not only does the visual editor begin working again, it does not display the custom buttons from buttonsnap.php (but I have another plugin, wordtube, whose button /does/ appear).

I have this problem too. It is caused by the use of buttonsnap.php which interferes with the tinymce editor. When the plugin is enabled the visual editor does not work properly.

After a bit of digging I have determined that my problem is caused by the plugin WP-ContactForm, specifically, the use of the Buttonsnap Class Library (buttonsnap.php) which adds a custom button to the tinymce editor. I suppose I will need to find a new plugin as I do not have the means to try and fix it.

There is a reference to this problem here:-
https://www.ads-software.com/support/topic/107146?replies=50#post-549986

Changing
'compress' => true, to 'compress' => false, fixed it for me on an upgrade from 2.3.1 to 2.5.

(Hey, where’s the preview button on this thing?)