[Mention GC bug in 6.8.2.
Bryan O'Sullivan <bos@serpentine.com>**20080605071038] {
hunk ./en/ch25-concurrent.xml 1103
+
+      <warning>
+	<title>Beware a GC bug in GHC 6.8.2</title>
+
+	<para>The garbage collector in release 6.8.2 of &GHC; has a
+	  bug that can cause programs using <function>par</function>
+	  to crash.  If you want to use <function>par</function> and
+	  you are using 6.8.2, we suggest upgrading to a newer
+	  release.</para>
+      </warning>
}