After I tried the December 2010 edition of Linux Mint Debian 64-bit, I had come to the conclusion that it was not for me, as it was, and that I would rather stick with the Main edition of Linux Mint, built on the current Ubuntu base distribution.
Two things made me change my mind and try it again: First, I tried Ubuntu 11.04 and I really did not like the new launcher! Second, I really could not put up with Mint’s Main Edition requirement, to have to back up and re-install from scratch with every new version…
So, I thought I should give LMDE 64-bit another try; and I’m glad I did!