Updating to WP 3.9 completely wiped out my visual editor setup.
But now I am experiencing a big problem since the update.
Text with any H1 (or H2 etc) tag and "centered" does not stay centered when previewed or published - it reverts to align left.
If the heading tag is removed, made "paragraph" again say, it centers properly. Its not a theme problem as I have tested this problem with different themes (2011, 2012, 2014) and same problem exists. It also appears to be effecting plugins like WP Edit (which is now replacing Ultimate TinyMCE) for WP 3.9.
Anyone having the same problem or have any ideas how to fix this? Everything was working fine until I did the 3.9 update last night.