I was trying to leave a comment on your site as below, but every time I tried to leave a comment everything went a bit mad and the site stopped loading. I'm hoping I didn't cause any issues!
So, I recently left a comment there about TinyMCE and WP-Mailing List from http://www.tribulant.com. Since then I think I've found out a bit more about what was causing errors!
I had a client in a bit of an urgent rush to get these errors fixed so with the help of firebug (best extension ever), I've found out a good chunk more.
It appears that the issue was actually being caused by
purl not being defined - which I traced back to cforms 2! cforms has an option to include a cform button in the editor. I worked this out when I disabled TinyMCE advanced, cleared my cache, reloaded and suddenly no toolbars were appearing, either in Write screens or in the Mailing List Plugin. On disabling the cforms "WP Editor Button support", all editor toolbars returned. I re-enabled Tinymce Advanced, and everything seems to be working fine now, in both Mailing list and normal write screens.
I then re-enabled the cforms button support and on full refresh of the normal write screen the cforms button re-appeared along with TinyMce Advanced toolbar.
On returning to the Mailing List plugin the editor I again received a js error of
purl is not defined at the following url:
Again, disabling this button support in cforms global options sorted it out.
I'm not sure exactly where the root cause of the conflict is, ie whether it's cforms, the mailing list, tiny mce advanced, or some combination (I'd say it's the latter as they all play nicely together when one of the 3 is dropped!).
I can only imagine it's hella-confusing.
If I can be of any more assistance in testing, please don't hesitate to ask. I will contact both Oliver and Antonie and update them on the issue by directing them to this thread.
Hopefully WordPress will make it easier to avoid such conflicts in the future. A plugin maker's life must not be an easy one!