moshu: The first box on Admin -> Options -> Writing (“Convert emoticons like ?? and ?? to graphics on display”) is unchecked, and has been since I installed WordPress. It was one of the first things I turned off. (It has just occurred to me that I should have mentioned this is WordPress MU… I foolishly thought that mention of “my users” would imply it, but I ought to know better. ?? There is no similar box on Users -> Your Profile. In fact, there are no check boxes of any kind of that page. They are all text input except for a lone select menu about how to publicly display your name.
This was the source of my criticism of the other posts that say they answered this question: I have no such boxes.
peiqinglong: Thank you for the advice. I will look into this and see if I can disable the stripping.
moshu (again): Both blogs on my site (the main blog, and a user blog I’ve been using to test) are recently updated to 2.2.1. I have not used the TinyCE editor, but when I post using inline style data, it’s still getting stripped. ?? It’s got to be WordPress MU that’s doing it. Sigh.
Thank you all for your insight and help. I’ll report back what I find about peiqinglong‘s suggestion.