for anyone interested that firmware version is found on the russian hikvision ftp site ftp://ftp.hikvision.ru/01.%20%D0%A0%D0%B5%D0%B3%D0%B8%D1%81%D1%82%D1%80%D0%B0%D1%82%D0%BE%D1%80%D1%8B/
Ok. tried V 4.1.60 on my 7608NI-I2/8P which was previously running V 4.1.54. Updated through the web interface using link provided by @redavenger.
Whereas I was able to view live streams and playback in Chrome browser with V 4.1.54 it no longer works in V 4.1.60. So if you are after live stream and playback in Chrome I suggest going back to the previous firmware which did work.
The only notable change that I could see is a new menu item on the web interface called "human body detection". When I select, it tells me that my cams don't support that function.
All up seems to be more downgrade than upgrade.
(UPDATE)
Just noticed I can no longer see the live view through Internet Explorer for my 2CD2385. My 4MP and 3MP cams seem to work.
This was after updating Webcomponents and clearing the browser cache.