Btw Adam, a long long time ago (well, few years ago) there was an effort for better DLL support in D: http://dsource.org/projects/ddl/
There was also a presentation here: http://vimeo.com/2264486 and slides: http://replay.waybackmachine.org/20081203030930/http://team0xf.com/conference/DDL.pdf Anyway, it might be a useful resource for what seem to be D's DLL problems.
