Speaking of issues that will frustrate newcomers... having dmd generate executables that segfault would be particularly /bad/.
I refer to my post 19 on this bug: http://d.puremagic.com/issues/show_bug.cgi?id=5278 (which is the most recent as of this writing.) Stock DMD hasn't worked on my system for... let's see... a little over a year now. I just can't compile things with D unless I go through some strange contortions. The problem was introduced when -L--export-dynamic was placed in dmd.conf. Unless there is an important reason for -L--export-dynamic to be there, could we please remove it? It makes my (usually awesome) D experience, uh, suck! (From my perspective it was unceremoniously added and then made my compiler just spontaneously not work at all anymore. Bad bad bad!)