Index: src/org/aspectj/weaver/loadtime/Aj.java
===================================================================
RCS file: /home/technology/org.aspectj/modules/loadtime/src/org/aspectj/weaver/loadtime/Aj.java,v
retrieving revision 1.15
diff -u -r1.15 Aj.java
--- src/org/aspectj/weaver/loadtime/Aj.java	13 Dec 2005 22:23:24 -0000	1.15
+++ src/org/aspectj/weaver/loadtime/Aj.java	8 May 2006 22:54:12 -0000
@@ -124,7 +124,7 @@
             this.isInitialized = false;
         }
 
-        private void initialize(ClassLoader loader, IWeavingContext weavingContext) {
+        private synchronized void initialize(ClassLoader loader, IWeavingContext weavingContext) {
             if (!isInitialized) {
                 isInitialized = true;
                 weavingAdaptor.initialize(loader, weavingContext);