Uncanny Automator recently switched to using TinyMCE for their WYSIWYG text edit areas (e.g. automated email content.) Since doing so, their WYSIWYG areas are broken if Toolset is also installed. This has to do with Toolset loading up assets on admin pages controlled by automator.
Uncanny provided me with a fix (pasted below) but I thought you might want to investigate this yourself as Toolset and Automator are both very popular plugins. I'm sure I'm not the only person who had this problem!