clojure.core.reducers was left out of post-build compile and ilmerge. This is not as noticeable for debug builds since they can fall back to source.

For example:
1. Download from here:
http://sourceforge.net/projects/clojureclr/files/clojure-clr-1.6.0-Release-4.0.zip/download
2. Unzip and run the following, you should see this error:

C:\Users\Dave\Downloads\clojure-clr-1.6.0-Release-4.0\Release 4.0>Clojure.Main
Clojure 1.6.0
user=> (require '[clojure.core.reducers :as r])
FileNotFoundException Could not locate clojure.core.reducers.clj.dll or clojure/core/reducers.clj on load path. clojure/core$load_lib$fn_17276_17280.invoke (:0)

This patch should add reducers to the lists for compilation and ilmerge.