When using the latest Release version (4.0.4.2) of Umbraco, the tinymce3 control fails to show/load in the backoffice of umbraco.
Instead a JavaScript error is shown:
--- ERROR CONTENT --- Message: Invalid argument. Line: 1 Char: 14609 Code: 0
URI: http://example.com/umbraco/plugins/tinymce3/tinymce3tinymceCompress.aspx?rnd=5c8e3f37-f32a-481f-a795-c4f6bc57057e&module=gzipmodule&themes=umbraco&plugins=contextmenu,table,umbracomacro,paste,inlinepopups,media,umbracocss,advimage,advlink,noneditable&languages=en
Everything else runs fine in all other browsers, but in IE 6+7+8 this JS error shows.
Server info: Windows 2008 IIS 7 Classic App Pool (Have also tried integrated app pool)
Help appriciated, have tried acertified Umbraco company (they installed and have setup the solution, but they kind of gave up, and we only discovered the issue after the first 6 customers was up and running on the single installation)