Is there any simple solution on problems with firefox 11 and multiple tinymce instances? Yes I use old one 3.3.3 "Speedy" and plan to upgrade in near future...
Upgrading to latest stable version of tinymce makes the trick. We need to do more testing though before announcing the solution as we have some Newscoop custom plugins for the editor and we need to make sure those work with the new version. I will make some testing today and tomorrow will publish a how-to explaining the process to fix the problem.