The most commonly reported bug at the moment seems to be a crash when you quit the game in exclusive mode. I am working with Unity to get a fix or workaround for that one. If this crash happens for you you'll have to play in standard mode for now.
There is a problem with stats on GoG at the moment. I've got a fix for that and I'll try to get it updated ASAP.
There are rendering problems with older AMD cards. We ordered one and will try to resolve this once we can do some tests.
Some other bugs are reported for hardware we don't have in the office, so we'll have to order an example for tests.
At the moment there is a bank holiday in the UK, so Tuesday is the earliest we can look at ordering test hardware.
Please use the instruction in viewtopic.php?f=4&t=5414 to report bugs. Our QA is collecting them into our bug database and merging duplicates.