In trying to answer this question I noticed that the first three words of my answer kept being eaten up. In despair, I erased my answer, started a new one, but to no avail: the first words still disappeared. And now I have the suspicion that it was because the disappearing words were "Dear Mark, the". Is the address "Dear..." forbidden here?
Ah, found the Meta.SO post: Should 'Hi', 'thanks', taglines, and salutations be removed from posts?
Salutations are automatically removed from questions.
Similarly for certain types of @lerts in comments: Eeeeek - what happened to my @ salutation?
I think users here are quite dear.
By the way: did you receive my mail with Suslin's papers on stably free modules? Otherwise I can send them to you again.
PS: At the moment the engine doesn't catch empty characters
​ which I interweaved with the greeting.
Note to readers: a similar prior question was posed on the "English Language & Usage SE" site. Compare the replies there - where some interesting points are made.
the users are indeed dear.
not see the problem in the meta, and the system running both sites is the same.