In April, I posted about a possible bug in LMDE's installer :
Just for the record, I reproduced the bug a few days ago, when trying for a second time to install LMDE. My /home partition has different directories, one for each distro (e.g. /home/opensuse, /home/fedora, etc...). My Mint 10 users are in /home/mint/julia/. When I install LMDE, and choose to reuse this /home partition, the LMDE user is created in /home, and /home/mint is removed by the installer . Other sub-directories of /home are not affected.