A new patch 1.2 can be downloaded at
http://forum.1cpublishing.eu/showthread.php?t=229790
In general Hylfire was designed for short games, a few nights, until level 25-30 max. But you can play until the finish if you wish, but we haven't reduced the amount of undead from Greenwort. Or changed anything from there. Also you won't get more skills after leveling up after level 30 or so, just stats like mana/rage/int/def/att/gold.
Some games will be easier if you are lucky with the skills you get after leveling up (you only have 1-2 skills open at start!). Some more difficult.
KNOWN BUGS:
In general we have reduced crashes compared to vanilla however we have seen crashes when entering battle, you can reload and take a few items/Creatires off and put them on again, then the randomization is different (I guess it is a bug with the auto summoning the Warrior and Paladin have, it is probably when they find the same place as the companion - only Terroin can fix it, and he is not playing KB at the moment... sad...)