The latest .po files (with the additional items you mention) are already available in the downloads area. I uploaded them yesterday. Sorry they were not in the one you previously translated. They were a late decision.
Month names – not sure why they wouldn’t be translated. I will investigate further, but not before tomorrow.
Interactive tree abbreviations b,m,d. Yes they are a problem. They really cannot be translated effectively as the very concept of single-letter abbreviations doesn’t work in some languages. That is why they were never before included. They are used in order to save some space in that tiny chart. I see that Greg has overcome this by using the full words and larger boxes. Not sure I like that but I will look into it.