Just installed 22.214.171.124 and start center displays contents of password protected files.
I see that 80755 is marked "Verified Fixed" but it doesn't look that way to me.
*** This bug has been marked as a duplicate of bug 80755 ***
If you read bug 80755 comment 19, you’ll know that:
> No new thumbnail will be generated. The reason is that the
> current code doesn't overwrite existing thumbnail with an empty one.
So if you have documents that show up with a thumbnail, it will no longer be updated when the document is modified, and you can easily remove it from the document by opening it with an archive manager. Also, you can just remove it from the Recent Documents list.