First off, I'd like to apologize for the many rules I'm sure I'm breaking by doing this, but I'm too busy and hurried to do it correctly, (actually I was almost too busy to do it at all), the person who was supposed to be doing this disappeared, and no one else has taken responsibility.... So here I am. I know this is not quite the place, but I really have no time to mess with mailing lists. That said:
As you may know, the CMT (Computer Music Toolkit) is outdated and broken on 64-bit Debian (and derivates).
(Not) Attached is a fixed cmt.so. It's also a newer version than the one in the repos (this is 1.16).
Just replace the cmt.so in your /usr/lib/ladspa with this one. I didn't test all the plugins, but at least Freeverb and the delays (what I wanted) work.
For those who prefer to compile, just change this line in your Makefile:
CFLAGS = $(INCLUDES) -Wall -fno-strict-aliasing -O3 -fPIC
Good luck

Expert in non-working solutions.
(Signature shamelessly ripped from someone else, is still the truth)