try to build against 3.6RC1 (with jdt.core v_A53)
diff --git a/features/org.eclipse.objectteams.otdt.feature/ot-compiler-feature/feature.xml b/features/org.eclipse.objectteams.otdt.feature/ot-compiler-feature/feature.xml
index 64050d4..1b529d6 100644
--- a/features/org.eclipse.objectteams.otdt.feature/ot-compiler-feature/feature.xml
+++ b/features/org.eclipse.objectteams.otdt.feature/ot-compiler-feature/feature.xml
@@ -47,7 +47,7 @@
          id="org.eclipse.jdt.core"
          download-size="4704"
          install-size="4704"
-         version="3.6.0.v_A48"
+         version="3.6.0.v_A53"
          unpack="false"/>         
 
 </feature>