Not sure about the date but it is version PKG3.004EUA, listed on the Sony support pages as the latest firmware update. No idea about the second part of your question.
That said, it does work perfectly once I have switched the TV on and off a couple of times and as also mentioned on rare occasions it comes on perfectly first time and once it is working it never fails. At the moment it is something I can easily live with, it's just a tad annoying but there are far more important things to worry about.
Must also add that once it is working all the UHD channels such as BT 351 and the new VM 4K UHD channels are very good.