Today I found files that previously previewed fine and still show fine from local HD now show nonsense in C9 preview, both tab form and window form e.g.
<!doctype html> <HTML> <HEAD> <meta charset="utf-8"> <title>temp</title> </HEAD> <BODY> <table> <tr><td><b>one <tr><td>two </table> </BODY> </HTML>
And it is not even stable. Just a refresh of that C9 Preview tab changed the content:
Also, sometimes Refresh shows first the correct content:
then a moment again changing to the incorrect already pictured.
Other examples gave messed-up buttons:
This is on Google Chrome Version 52.0.2743.116 m (64-bit) with and without all extensions disabled.
I cleared all c9.io cookies and logged back in, and the problem has gone.