Don't know exactly what just happened, but something went wrong on the server. On one site I got error that the smarty_compile and smarty_cache was gone. It got moved and permissions changed (although it didnt seem a hack of some sort, its very strange).
Anyway I got that fixed back again,

But since then TinyMCE doesnt work anymore although its listed in the xoops_editorlist file.

1354082169
return array (
'textarea' =>
array (
'title' => 'Plain Text',
'nohtml' => 1,
),
'dhtmltextarea' =>
array (
'title' => 'DHTML Form with xCode',
'nohtml' => 1,
),
'tinymce' =>
array (
'title' => 'TinyMCE',
'nohtml' => 0,
),
);

You can select it, but it will ouput only html in FMContent en Simplywiki.

Any ideas how to get it working again ?

Ok, I have found the problem. Putting Debug on, showed an error message which related to the style.css file which contained a typo. Weird how that makes it go wrong hihi.
Still strange all the things that suddenly went wrong, cant put my finger on it

What does happen more often, after I post a question cause I cant find the solution, then suddenly I see the light hihihi.

Thank you for letting us know! And I am glad that it's solved!