Mike,
I have heard of CS issues with Leica in the past. Same with some other imported high end manufacturers to be honest. My experience with Zeiss was less than impressive, for example.
However, Leica knows this as well. Last year, they added something like 50 percent more CS staff and I believe they are on track to double that this year. They know that CS is now very often the thing that differentiates between a wide variety of good choices, and posts like this keeps everyone in the know.
I had need of their CS in just the past few months with my 1600. I had a contact over there and ended up dealing with him directly and had the opportunity to meet his boss at DSC and spend some time talking with them generally. Good guys.
It took a bit of time due to it being Christmas etc., but I can tell you that in the end, they MORE than took care of me. My impression is that they want to take the CS issue by the horns and they are eager to take care of their customers. That does not mean they'll give away the store, obviously, but I do believe they see their CS record as being a critical part of their future success.
That said, your RF being an original 1600 means it is way outside warranty, so I honestly cannot guess what they can do here or what it will cost to fix the problem. I think alot of manu's of these devices don't actually fix them anymore, they just replace them. I'm guessing Leica is the same, but it's worth a call to them to find out what the issue is and if anything can be done.
Good luck, and if you cannot get the right person on the phone, let me know and I'll see what I can do to connect you to someone.