I'm no editor expert - but I do not think that vbulletin's editor (
vb version 4.1.3) has anything to do with tinymce:
https://www.vbulletin.com/forum/show...hlight=tinymce
(I know: thread from 2007 - but their editor has as far as I am concerned not changed significantly the last years - until 4.1.4)
No chance of work around?