Well, my system went down today and would not boot again. I don’t have access to my Alix board via null modem so I am not sure what it was displaying there, but I did not see anything in log files (i connected cf to desktop pc to check it).
My solution was to load clean ZeroShell install to a new cf and manually configure everything again. (painful process 🙁 ) I tried to transfer old profile to the new cf, but that did not work either, so I am pretty positive that there was something wrong with the old profile. I hope that now at least it will be stable again.