I just ran into this problem as well, the installer hanging on "Configuring bootloader".
However, several conditions that the others in this thread had, I do not have. This is using the latest 64-bit LMDE DVD inside a VMware virtual environment, with a completely blank hard disk. I had to redo the install and not check the install grub, then used ahulsbos's directions
to get grub installed. I know the thread is a bit old, but I just ran into this and thought I'd report it. If need-be, I can report it as a bug.