Moved RC from a older Debian 7 box to a newer Debian 9 Box.
Right away, I was having some issues.
Issue #1
It would not start with debug logs showing it was having issues with a plugin we are using called: message_highlight
[27-Jun-2017 03:09:15 America/Los_Angeles] PHP Fatal error: Call to undefined function Q() in /www/vhosts/roundcubemail-1.2.1/plugins/message_highlight/message_highlight.php on line 141
If I turned off the plugin it works.
I tried to find an update for that, but am not really clear if there is one as when I updated composer information it didn't show up.
I decided to upgrade the installation from roundcubemail-1.2.1 to roundcubemail-1.3.0 which basically went without any errors...
But I still didn't see the message_highlight plugin.
Issue #2
I also noted a weird result when double clicking on a message where in the past it would show a full page of the message in the Main application screen (not a separate window like when you are composing. Instead it just shows the preview screen of the message.
I am not sure if for some reason an option is not turned on or if there is something I need to do to make that work again.
Ref:
Debian 9
Apache 2.4.25
MySQL 5.7.18
PHP 7.1.4
Roundcube Webmail 1.3.0
Installed plugins
Plugin Version License Source
archive 3.0 GPLv3+
filesystem_attachments 1.0 GPLv3+
jqueryui 1.12.0 GPLv3+
keyboard_shortcuts 2.4.1 GPL-2.0 Download
zipdownload 3.3 GPLv3+