Flashed this morning. Everything is OK - without freezes and soft resets. The only problem is battery indicator - like Beta 5 indicate 89 % when the battery is full. I have just installed Finix' CAB with coloured bat indicator. After rebooting the indication was 100 %. So the problem is solved now. I wonder the problem is not due to the extended battery.
The ROM is very good. I hope I keep week or more without flashing.