Thanks for all the testing.
I think this has been tried already, but it's worth a shot. Right-click on TinyMCE in Package Manager and select 'Remove package'. Repeat that if older versions show up until it's gone. Then re-download and re-install TinyMCE.
You could also try installing an older version of TinyMCE and then updating it -- that would test your theory about new installs.
If that doesn't work, you might try adding this around line 430 of newspublisher.class.php:
$tinyproperties['elements']='modx-richtext';
Another thing to try is adding this instead:
$tinyproperties['mode']='exact';
$tinyproperties['elements'='MyTv1,MyTv2,MyTv3';
Replace MyTv# with the actual names of your TVs (as shown in the 'name="something"' code in the source of the page).
[ed. note: BobRay last edited this post 14 years, 11 months ago.]