I have trouble with posts in 2.1b2.
If I write "test" in discussion and post, then will be OK.
If I write " test"(space before test), then I will get unreadable symbol such as "ԥst".
I solved this problem. It made Emotify plugin. After disable this plugin unreadable symbols disappeared. But smiles also disappeared. Then I took Emotify plugin from 2.2.x branch. And now all is OK.