Hi,
The QR Codes displayed on the home page are not usable when using the dark mode, they need a border around to separate them from the background.
This issue can be corrected by modifying the www/views/home.php file and replace the following:
<img ng-src="{{qr(...)}}" style="margin:3px 0">
by
<img ng-src="{{qr(...)}}" style="margin:3px 0;background-color:#fff;padding:3px;">
There is at least 3 occurences to change.
Tested with Repetier-Server 1.0.3 on RPi, may be present in previous versions.
Best Regards,
Nicolas.