So I ran the spell check on my message before I sent it and I fixed a couple of words. Two other words (RMA and Samsung) I added to the dictionary by clicking on the convenient button. Now, when the spell check was complete, the words RMA and Samsung were still underlined red UNTIL I clicked on the word or highlighted it. Confirmed this several different times from different machines.
Only minor, nothing big. First time I ever uses a spell check for IM…