The summer time bug was noticed on the day that the firmware was released. It's been nearly 2 months now, so it doesn't look very likely that new firmware will be released...but you never know.
The only way to get the programmes to show correctly, is if you use the latest firmware to download the XMLTV EPG, then reinstall the previous firmware. Of course, when the EPG needs updating again, you will have to install the latest firmware again & then repeat.