The most important change in 0.12.1 is related to HTML5 cache fix (proper detection of file changes on the server after the software upgrade or configuration change). This fix requires enabled "mod_headers" in Apache (see the .htaccess file); you can also disable "mod_expires" which is no longer used.

If you use other server than Apache then you need to configure it to return the following HTTP header (for all files):

instead of the previously used "Cache-Control: max-age=0" (for more information see: https://tools.ietf.org/html/rfc7234).

We also fixed all bugs reported on mailing list and/or by private e-mails ...