Nikon D700 issues

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Have any Nikon DSLR owners experienced the following. I purchased from
Nikon a refurbished D700 in June 2012. Because it had been discontinued,
inventory in retail stores was dried up and the only way one could still get
one was through Nikon's factory outlet refurbished. With the excellent reviews
and a price of under $2000.00 I decided to get one while still available. Less than 6 months later I have had to send it to Nikon for "err" messages appearing in the viewfinder. The shutter was replaced along with some minor parts and
after 10 days the "err" message re-appeared.
It has been repaired now twice for the same problem and I am awaiting delivery hoping the problem is solved once and for all. Has anyone with
full frame Nikon's experienced this problem?