I've now noticed a new, similar error that is likely related.
When I click the"image button" button, then browse I get:
Error: arg is undefined
Source File: http://eve-crtm.org/ccms/lib/CuteEditor/Scripts/Dialog/Dialog_SelectImage.js
Line: 1
I'm also getting:
Error: CuteWebUI_AjaxUploader_Initialize is not defined
Source File: BLOCKED SCRIPTalert('TODO: FIXME')
Line: 0
In a few spots.