i suspect something like the attached is needed...
Index: Win32/packaging/installer/components/dicts.nsh
===================================================================
--- Win32/packaging/installer/components/dicts.nsh (revision 22808)
+++ Win32/packaging/installer/components/dicts.nsh (working copy)
@@ -55,7 +55,7 @@
${DICT} is-0.51.1-0 "Íslenska" is 1536
${DICT} it-2.2_20050523-0 "Italiano" it 696
${DICT} hu-0.99.4.2-0 "Magyar" hu 1608
-${DICT} nl-opentaal200711.exe "Nederlands" nl 1333
+${DICT} nl-opentaal200711 "Nederlands" nl 1333
${DICT} nn-0.50.1-1 "Nynorsk" nn 1930
${DICT} fa-0.11-0 "Persian" fa 1667
${DICT} pl-6.0_20061121-0 "Polski" pl 1859
