Has absolutely nothing to do with ECF fixing it. It's vBulletin that needs to fix it. It's a compatibility issue with CKEditor that vBulletin hasn't addressed.
I saw fixes on the vbulletin forum where forum operators had fixed the problem for their forums. I linked to those answers in the feedback forum at least a month ago. Perhaps those fixes were tried and didn't work here - although no word of that has been posted. I haven't seen anything from ecf that either informs users of, or speaks to the problem, except for your post here. Maybe I missed it.